NASA astronauts Butch Wilmore, left, and Suni Williams share a laugh as they leave the operations and checkout building for a trip to launch pad at Space Launch Complex 41 Saturday, June 1, 2024, in Cape Canaveral, Fla. The two astronauts are scheduled to liftoff later today on the Boeing Starliner capsule for a trip to the international space station. . (AP Photo/John Raoux)
NASA astronauts Suni Williams, left, and Butch Wilmore talk to family members as they leave the operations and checkout building for a trip to launch pad at Space Launch Complex 41 Saturday, June 1, 2024, in Cape Canaveral, Fla. The two astronauts are scheduled to liftoff later today on the Boeing Starliner capsule for a trip to the international space station. . (AP Photo/John Raoux)
NASA astronauts Suni Williams, left, and Butch Wilmore talk to family members as they leave the operations and checkout building for a trip to launch pad at Space Launch Complex 41 Saturday, June 1, 2024, in Cape Canaveral, Fla. The two astronauts are scheduled to liftoff later today on the Boeing Starliner capsule for a trip to the international space station. . (AP Photo/John Raoux)
NASA astronauts Butch Wilmore, left, and Suni Williams leave the operations and checkout building for a trip to launch pad at Space Launch Complex 41 Saturday, June 1, 2024, in Cape Canaveral, Fla. The two astronauts are scheduled to liftoff later today on the Boeing Starliner capsule for a trip to the international space station. . (AP Photo/John Raoux)
Boeing's Starliner capsule, atop an Atlas V rocket, sits on the launch pad during sunrise at Space Launch Complex 41 Saturday, June 1, 2024, in Cape Canaveral, Fla. NASA astronauts Butch Wilmore and Suni Williams will launch aboard the rocket to the International Space Station, scheduled for liftoff later Saturday. (AP Photo/Chris O'Meara)
Boeing's Starliner capsule, atop an Atlas V rocket, sits on the launch pad during sunrise at Space Launch Complex 41 Saturday, June 1, 2024, in Cape Canaveral, Fla. NASA astronauts Butch Wilmore and Suni Williams will launch aboard the rocket to the International Space Station, scheduled for liftoff later Saturday. (AP Photo/Chris O'Meara)
NASA astronauts Butch Wilmore and Suni Williams, riding in the astro van, drive by the Vehicle Assembly Building on the way back to the operations and checkout building after the launch was scrubbed Saturday, June 1, 2024, in Cape Canaveral, Fla. (AP Photo/Chris O'Meara)
Tory Bruno, right, president and CEO of United Launch Alliance, speaks during a news conference with Steve Stich, left, manager of NASA's Commercial Crew Program, and Mark Nappi, center, vice president and program manager of the Commercial Crew Program for Boeing, after the launch of Boeing's Starliner Atlas V rocket was scrubbed at the Cape Canaveral Space Force Station for a mission to the International Space Station, Saturday, June 1, 2024, in Cape Canaveral, Fla. (AP Photo/John Raoux)
Tory Bruno, president and CEO of United Launch Alliance, speaks during a news conference after the launch of Boeing's Starliner Atlas V rocket was scrubbed at the Cape Canaveral Space Force Station for a mission to the International Space Station, Saturday, June 1, 2024, in Cape Canaveral, Fla. (AP Photo/John Raoux)
Boeing's Starliner capsule, atop an Atlas V rocket, sits the launch pad at Space Launch Complex 41 after being scrubbed Saturday, June 1, 2024, in Cape Canaveral, Fla. (AP Photo/Chris O'Meara)
NASA astronauts Butch Wilmore, left, and Suni Williams waves as they leave the operations and checkout building for a trip to launch pad at Space Launch Complex 41 Saturday, June 1, 2024, in Cape Canaveral, Fla. The two astronauts are scheduled to liftoff later today on the Boeing Starliner capsule for a trip to the international space station. . (AP Photo/John Raoux)
Copyright 2024 The Associated Press. All rights reserved.
NASA astronauts Butch Wilmore, left, and Suni Williams share a laugh as they leave the operations and checkout building for a trip to launch pad at Space Launch Complex 41 Saturday, June 1, 2024, in Cape Canaveral, Fla. The two astronauts are scheduled to liftoff later today on the Boeing Starliner capsule for a trip to the international space station. . (AP Photo/John Raoux)
Two NASA astronauts were strapped into the company’s Starliner capsule and awaiting liftoff when the countdown was halted at three minutes and 50 seconds.
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With only a split second to take off Saturday afternoon, there was no time to work the latest trouble and everything was called off.
The launch was previously delayed for leak checks and rocket repairs.
Other launch opportunities are available on Sunday, June 2, Wednesday, June 5, and Thursday, June 6, according to NASA.
NASA wants a backup to SpaceX, which has been flying astronauts for four years.
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