SpaceX's Musk gets mixed virus tests on eve of crew launch A mockup of the SpaceX crew capsule is seen on display in front of the Vehicle Assembly Building during a news conference at the Kennedy Space Center in Cape Canaveral, Fla., Friday, Nov. 13, 2020. (AP Photo/John Raoux)
A United Launch Alliance Atlas V rocket carrying a classified spacecraft payload for the U.S. National Reconnaissance Office lifts off from Complex 41 at the Cape Canaveral Air Force Station, Friday, Nov. 13, 2020, in Cape Canaveral, Fla. (AP Photo/John Raoux)
A United Launch Alliance Atlas V rocket carrying a classified spacecraft payload for the U.S. National Reconnaissance Office lifts off from Complex 41 at the Cape Canaveral Air Force Station, Friday, Nov. 13, 2020, in Cape Canaveral, Fla. (AP Photo/John Raoux)
A United Launch Alliance Atlas V rocket carrying a classified spacecraft payload for the U.S. National Reconnaissance Office lifts off from Complex 41 at the Cape Canaveral Air Force Station, Friday, Nov. 13, 2020, in Cape Canaveral, Fla. (AP Photo/John Raoux)
A United Launch Alliance Atlas V rocket carrying a classified spacecraft payload for the U.S. National Reconnaissance Office lifts off from Complex 41 at the Cape Canaveral Air Force Station, Friday, Nov. 13, 2020, in Cape Canaveral, Fla. (AP Photo/John Raoux)
A SpaceX Falcon 9 rocket with the company's Crew Dragon spacecraft onboard is seen on the launch pad at Launch Complex 39A at the Kennedy Space Center in Cape Canaveral, Fla., Friday, Nov. 13, 2020. Four astronauts will fly on the SpaceX Crew-1 mission to the International Space Station. (AP Photo/John Raoux)
NASA astronauts, from left, Shannon Walker, Victor Glover, Mike Hopkins and Japan Aerospace Exploration Agency (JAXA) astronaut Soichi Noguchi, right, wearing SpaceX spacesuits, stop to pose for a picture as walk out of the Neil A. Armstrong Operations and Checkout Building to depart for Launch Complex 39A during a dress rehearsal Thursday, Nov. 12, 2020, at NASA's Kennedy Space Center in Cape Canaveral, Fla., for a scheduled Nov. 14 launch to the International Space Station (Joel Kowsky/NASA via AP)
Hiroshi Sasaki, right, vice president and director general, Japanese Space Agency Human Spaceflight Technology Directorate speaks as NASA administrator Jim Bridenstine, left, listens during a news conference at the Kennedy Space Center in Cape Canaveral, Fla., Friday, Nov. 13, 2020. (AP Photo/John Raoux)
NASA administrator Jim Bridenstine, center, speaks during a news conference with astronauts Suni Williams, back left, and Jonny Kim, in front of a mockup of the SpaceX crew capsule at the Kennedy Space Center in Cape Canaveral, Fla., Friday, Nov. 13, 2020. (AP Photo/John Raoux)
NASA firefighters drive on the road outside the fence near a SpaceX Falcon 9 rocket, with the company's Crew Dragon capsule attached, sits on the launch pad at Launch Complex 39A Friday, Nov. 13, 2020, at the Kennedy Space Center in Cape Canaveral, Fla. Four astronauts will fly on the SpaceX Crew-1 mission to the International Space Station scheduled for launch on Nov. 14, 2020 (AP Photo/Chris O'Meara)
A SpaceX Falcon 9 rocket, with the company's Crew Dragon capsule attached, sits on the launch pad at Launch Complex 39A Friday, Nov. 13, 2020, at the Kennedy Space Center in Cape Canaveral, Fla. Four astronauts will fly on the SpaceX Crew-1 mission to the International Space Station scheduled for launch on Nov. 14, 2020 (AP Photo/Chris O'Meara)
Photographers set up remote cameras near a SpaceX Falcon 9 rocket, with the company's Crew Dragon capsule attached, as she sits on the launch pad at Launch Complex 39A Friday, Nov. 13, 2020, at the Kennedy Space Center in Cape Canaveral, Fla. Four astronauts will fly on the SpaceX Crew-1 mission to the International Space Station scheduled for launch on Nov. 14, 2020 (AP Photo/Chris O'Meara)
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A mockup of the SpaceX crew capsule is seen on display in front of the Vehicle Assembly Building during a news conference at the Kennedy Space Center in Cape Canaveral, Fla., Friday, Nov. 13, 2020. (AP Photo/John Raoux)