A SpaceX Falcon 9 launched the GPS III SV10 (Space Vehiche 10 also known as GPS III-8) satellite for the U.S. Space Force from Space Launch Complex 40(SLC-40) at Cape Canaveral Space Force Station on Tuesday (April 21) at 0653 UTC marking the delivery of the final satellite in the GPS III production block and completing the service's most resilient constellation to date.

The Falcon 9 Block 5's first-stage booster B1095, came back to Earth about 8.5 minutes after launch as planned on Tuesday, touching down softly in the Atlantic Ocean on the SpaceX droneship "Just Read the Instructions."

This was the seventh launch and landing for this particular booster, according to a SpaceX mission description. And it was the final Falcon landing for "Just Read the Instructions," SpaceX said during Tuesday's launch commentary; the droneship will now pivot to supporting liftoffs of SpaceX's Starship megarocket.

"After 156 successful Falcon 9 landings, Just Read the Instructions will be fully dedicated to support Starship operations going forward," SpaceX wrote on X.

The Falcon 9's upper stage, meanwhile, continued powering its way to medium-Earth orbit, deploying GPS III SV10 about 90 minutes after liftoff. Following separation, the satellite will use its own liquid apogee engines to raise its orbit to the operational medium Earth orbit at approximately 20,200 kilometers altitude, a process taking roughly 10 days.

With the addition of SV10, the active GPS constellation now includes 32 satellites, providing increased redundancy and resiliency. Mission Delta 31 of the Space Force will oversee on-orbit checkout and eventual integration into the live navigation network.

SV10 is the tenth and last spacecraft under the original GPS III production contract awarded to Lockheed Martin in 2008. The satellite, nicknamed "Hedy Lamarr" after the actress and inventor who co-patented frequency-hopping technology, was built in Colorado and declared available for launch in December 2022.

The new satellite enhances the constellation with M-code technology, providing three times greater positional accuracy and eight times improved jam resistance compared to previous generations. This upgrade significantly boosts the effectiveness and lethality of U.S. military weapon systems while improving civilian navigation.

"GPS III satellites have a three-fold increase in positional accuracy and an eight-fold improvement in jam resistance compared to prior versions," Space Force officials said in a statement on Jan. 28, just after GPS III SV09 rode a Falcon 9 to orbit.

"These advanced features enable the constellation to provide an across-the-board boost in effectiveness and lethality to weapon systems in every theater," they added.

SV10 carries several developmental payloads to test future GPS capabilities, including:

• Crosslink Demonstration Payload: Tests optical crosslink communications to improve ground segment resilience and enable faster satellite tasking.

• Digital Rubidium Atomic Frequency Standard (DRAFS): A new space-qualified atomic clock to enhance long-term timing precision for future GPS IIIF missions.

• Laser Retroreflector Array (LRA)**: The second use of an LRA to support NASA's scientific research and improve Earth center determination.

• 3D-Printed Omni Antenna: The first use of this advanced manufacturing component, which reduces production time and costs by nearly 60 percent.

GPS III-8 mission demonstrated the National Security Space Launch (NSSL) program's flexibility, as SpaceX was selected as the launch provider with less than seven weeks notice following a change in launch service provider. This rapid turnaround built upon accelerated timelines established by previous GPS III launches in 2024, 2025, and early 2026.

GPS III SV10 was originally supposed to fly aboard United Launch Alliance's new Vulcan Centaur rocket. Last month, however, the Space Force announced that it was switching the satellite to a Falcon 9 due to issues that Vulcan has experienced with its solid rocket boosters (SRBs).

As part of this rocket swap, Vulcan Centaur will now launch the USSF-70 national security mission, which had been slated to fly on a SpaceX Falcon Heavy. USSF-70 is expected to launch no earlier than summer 2028, Space Force officials have said. (Presumably, Vulcan Centaur's SRB issues will be worked out by then.)

Tim Cook is stepping down as Apple CEO on September 1, 2026, following a nearly 15-year tenure that grew the company’s market capitalization from $348 billion to roughly $4 trillion. He will be succeeded by John Ternus, the current Senior Vice President of Hardware Engineering, who will become Apple’s fourth CEO.

Cook will remain at the company as Executive Chairman, a role focused on global policy engagement and regulatory relationships.

The transition was unanimously approved by the board and described as the result of long-term succession planning, despite Cook recently dismissing departure rumors.

Ternus, 50, has been with Apple since 2001 and oversees the hardware development for products generating about 80% of Apple’s revenue, including the iPhone, iPad, Mac, and Apple Watch. His promotion follows the departure of key executives such as COO Jeff Williams and CFO Luca Maestri, leaving Ternus to inherit significant challenges in AI integration, regulatory compliance, and supply chain management.

A mechanical engineer from the University of Pennsylvania, Ternus rose through the hardware ranks, leading the teams behind the iPad, AirPods, and recent iPhone models. He is viewed as a stable, internal choice who understands Apple’s product roadmap deeply.

Ternus inherits a complex landscape, including Apple’s lagging AI strategy, ongoing antitrust fines in the EU, and a need to navigate a substantially rebuilt executive team.

Since becoming CEO in 2011, Cook transformed Apple’s supply chain, launched the services business (now exceeding $100 billion annually), and introduced major product categories like the Apple Watch and AirPods.

Apple shares fell slightly (around 1%) in after-hours trading Monday, with investors largely viewing the leadership change as an orderly transition rather than a crisis.

President Donald Trump announced on Truth Social that the U.S. Navy fired on and seized the Iranian-flagged cargo ship Touska, in the Gulf of Oman after it ignored warnings to stop during an attempt to bypass the U.S. naval blockade of Iranian ports.

The USS Spruance, a guided-missile destroyer, disabled the vessel by blowing a hole in its engine room, and U.S. Marines subsequently took custody of the ship, which is under U.S. Treasury sanctions due to its "prior history of illegal activity." Trump stated, “We have full custody of the ship, and are seeing what’s on board!”

"Today, an Iranian-flagged cargo ship named TOUSKA, nearly 900 feet long and weighing almost as much as an aircraft carrier, tried to get past our Naval Blockade, and it did not go well for them," Trump wrote on Truth Social. "The U.S. Navy Guided Missile Destroyer USS SPRUANCE intercepted the TOUSKA in the Gulf of Oman, and gave them fair warning to stop. The Iranian crew refused to listen, so our Navy ship stopped them right in their tracks by blowing a hole in the engineroom. Right now, U.S. Marines have custody of the vessel. The TOUSKA is under U.S. Treasury Sanctions because of their prior history of illegal activity. We have full custody of the ship, and are seeing what’s on board!"

The incident occurred amid escalating tensions and just before a possible new round of U.S.-Iran peace talks in Islamabad, Pakistan.

Trump accused Iran’s Islamic Revolutionary Guard Corps (IRGC) of violating the two-week ceasefire by firing on two UK and French-flagged ships in the Strait of Hormuz, calling it a “Total Violation of our Ceasefire Agreement!”

Two Indian-flagged tankers were reportedly fired upon by Iranian Revolutionary Guard Corps (IRGC) gunboats while attempting to transit the Strait of Hormuz on Saturday, prompting a diplomatic protest from India.

Audio and video clips circulating on X captured the distressing moments, including a frantic plea from the captain of the Sanmar Herald, a motor tanker, who exclaimed: “Sepah Navy! Sepah Navy! This is motor tanker Sanmar Herald! You gave me clearance to go! My name is second on your list! You are firing now! Let me turn back!” The audio has been verified via maritime tracking data by TankerTrackers.com and confirmed by the UK Maritime Trade Operations (UKMTO). No injuries or significant damage were reported; both vessels safely reversed course.

The Indian Ministry of External Affairs summoned Iran’s ambassador, expressing deep concern and urging the restoration of safe passage for Indian ships, recalling Iran’s prior cooperation. Iran’s Supreme Leader’s representative in India stated the bilateral relationship remains strong and expressed hope the incident would be resolved.

"Iran decided to fire bullets yesterday in the Strait of Hormuz — A Total Violation of our Ceasefire Agreement! Many of them were aimed at a French Ship, and a Freighter from the United Kingdom," Trump claimed on Truth Social. "That wasn’t nice, was it? My Representatives are going to Islamabad, Pakistan — They will be there tomorrow evening, for Negotiations. Iran recently announced that they were closing the Strait, which is strange, because our BLOCKADE has already closed it. They’re helping us without knowing, and they are the ones that lose with the closed passage, $500 Million Dollars a day! The United States loses nothing. In fact, many Ships are headed, right now, to the U.S., Texas, Louisiana, and Alaska, to load up, compliments of the IRGC, always wanting to be 'the tough guy!' We’re offering a very fair and reasonable DEAL, and I hope they take it because, if they don’t, the United States is going to knock out every single Power Plant, and every single Bridge, in Iran. NO MORE MR. NICE GUY! They’ll come down fast, they’ll come down easy and, if they don’t take the DEAL, it will be my Honor to do what has to be done, which should have been done to Iran, by other Presidents, for the last 47 years. IT’S TIME FOR THE IRAN KILLING MACHINE TO END!"

While French shipping company CMA CGM confirmed one of its vessels was targeted by warning shots, and India reported attacks on its ships, the UK denied any attacks on British-linked vessels. Iran, however, has not confirmed the seizure of Touska and dismissed reports of renewed talks as false, citing the U.S. blockade as unlawful.

Iran had briefly reopened the Strait of Hormuz on April 17 following a 10-day truce and a ceasefire in Lebanon, but reversed the decision within 24 hours after the U.S. maintained its naval blockade of Iranian ports. Iran’s IRGC declared the strait under “strict management,” warning that any vessel approaching without authorization would be considered hostile and targeted.

The Sanmar Herald and another Indian-flagged vessel, Bhagya Lakshmi, were turned back — the latter after being instructed by Iranian forces to “turn around immediately” due to lack of clearance.

The Strait of Hormuz remains closed, affecting about 20% of global oil shipments.

The U.S. demands Iran halt uranium enrichment for 20 years, while Iran insists on its right to enrichment and the lifting of sanctions. Despite Iranian state media rejecting negotiations, U.S. officials, including Vice President JD Vance, Middle East Envoy Steve Witkoff, and Trump's son-in-law Jared Kushner, are preparing to travel to Islamabad for mediated talks, with the ceasefire set to expire on Wednesday.