SpaceX SN15 starship prototype liftoffs from the company's starship facility in Boca Chica, Texas, U.S. May 5, 2021. REUTERS/Gene Blevins

SpaceX SN15 starship prototype liftoffs from the company's starship facility in Boca Chica, Texas, U.S. May 5, 2021. REUTERS/Gene Blevins

SpaceX SN15 starship prototype liftoffs from the company's starship facility in Boca Chica, Texas, U.S. May 5, 2021. REUTERS/Gene Blevins

SpaceX SN15 starship prototype liftoffs from the company's starship facility in Boca Chica, Texas, U.S. May 5, 2021. REUTERS/Gene Blevins

SpaceX SN15 starship prototype liftoffs from the company's starship facility in Boca Chica, Texas, U.S. May 5, 2021. REUTERS/Gene Blevins

The contrail of a United Launch Alliance Atlas 5 rocket is illuminated by the sun after liftoff from the Cape Canaveral Air Force Station, as viewed from 65 miles (around 105 km) away in Kissimmee, Florida, U.S., August 8, 2019. Aboard is the fifth Advanced Extremely High Frequency (AEHF) satellite, designed to provide the U.S. military with highly secure communications. REUTERS/Gregg Newton

The contrail of a United Launch Alliance Atlas 5 rocket is illuminated by the sun after liftoff from the Cape Canaveral Air Force Station, as viewed from 65 miles (around 105 km) away in Kissimmee, Florida, U.S., August 8, 2019. Aboard is the fifth Advanced Extremely High Frequency (AEHF) satellite, designed to provide the U.S. military with highly secure communications. REUTERS/Gregg Newton

The contrail of a United Launch Alliance Atlas 5 rocket is illuminated by the sun after liftoff from the Cape Canaveral Air Force Station, as viewed from 65 miles (around 105 km) away in Kissimmee, Florida, U.S., August 8, 2019. Aboard is the fifth Advanced Extremely High Frequency (AEHF) satellite, designed to provide the U.S. military with highly secure communications. REUTERS/Gregg Newton

The contrail of a United Launch Alliance Atlas 5 rocket is illuminated by the sun after liftoff from the Cape Canaveral Air Force Station, as viewed from 65 miles (around 105 km) away in Kissimmee, Florida, U.S., August 8, 2019. Aboard is the fifth Advanced Extremely High Frequency (AEHF) satellite, designed to provide the U.S. military with highly secure communications. REUTERS/Gregg Newton

The contrail of a United Launch Alliance Atlas 5 rocket is illuminated by the sun after liftoff from the Cape Canaveral Air Force Station, as viewed from 65 miles (around 105 km) away in Kissimmee, Florida, U.S., August 8, 2019. Aboard is the fifth Advanced Extremely High Frequency (AEHF) satellite, designed to provide the U.S. military with highly secure communications. REUTERS/Gregg Newton TPX IMAGES OF THE DAY

The contrail of a United Launch Alliance Atlas 5 rocket is illuminated by the sun after liftoff from the Cape Canaveral Air Force Station, as viewed from 65 miles (around 105 km) away in Kissimmee, Florida, U.S., August 8, 2019. Aboard is the fifth Advanced Extremely High Frequency (AEHF) satellite, designed to provide the U.S. military with highly secure communications. REUTERS/Gregg Newton

A SpaceX Falcon Heavy rocket, carrying the U.S. Air Force's Space Test Program 2 Mission, before its first nighttime liftoff from the Kennedy Space Center in Cape Canaveral, Florida, U.S., June 25, 2019. REUTERS/Joe Skipper

Charlie Blackwell-Thompson, launch director for NASA's Exploration Ground Systems Program, sits at her console in Firing Room 4 during a NASA "Apollo - Then and Now" event at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 23, 2019. She will oversee the countdown and liftoff of NASA's Space Launch System rocket and Orion spacecraft during its first flight test, called Exploration Mission-1. REUTERS/Joe Skipper

Charlie Blackwell-Thompson, launch director for NASA's Exploration Ground Systems Program, speaks about a photo taken in Firing Room 4 on the day Apollo 11 launched, during a NASA "Apollo - Then and Now" event at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 23, 2019. She will oversee the countdown and liftoff of NASA's Space Launch System rocket and Orion spacecraft during its first flight test, called Exploration Mission-1. REUTERS/Joe Skipper

Charlie Blackwell-Thompson, Launch Director for NASA's Exploration Ground Systems Program, reacts as she sits at her console in Firing Room 4 during a NASA "Apollo - Then and Now" event at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 23, 2019. She will oversee the countdown and liftoff of NASA's Space Launch System rocket and Orion spacecraft during its first flight test, called Exploration Mission-1 REUTERS/Joe Skipper

Charlie Blackwell-Thompson, Launch Director for NASA's Exploration Ground Systems Program, sits at her console in Firing Room 4 during a NASA "Apollo - Then and Now" event at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 23, 2019. She will oversee the countdown and liftoff of NASA's Space Launch System rocket and Orion spacecraft during its first flight test, called Exploration Mission-1. REUTERS/Joe Skipper

Local residents at Lompoc Airport sit waiting for the launch of a United Launch Alliance Atlas V rocket carrying NASA's InSight Mars lander as heavy fog blocking the view of liftoff at Vandenberg Air Force base in California, U.S., May 5, 2018. REUTERS/Gene Blevins

Indiana University student Constance Strawn of Bloomington, Indiana, gets ready to watch her first SpaceX launch, several hours before liftoff of the first Falcon Heavy rocket, from a vantage point at Cocoa Beach, Florida, U.S., February 6, 2018. REUTERS/Gregg Newton

A Secret Service agent keeps watch as Marine One taxis for liftoff, to take U.S. President Donald Trump and his staff to nearby Camp David to meet with the National Security Council to try to agree on a strategy for Afghanistan, in Hagerstown, Maryland, U.S., August 18, 2017. REUTERS/Kevin Lamarque

A Secret Service agent keeps watch as Marine One prepares for liftoff, to take U.S. President Donald Trump and his staff to nearby Camp David to meet with the National Security Council to try to agree on a strategy for Afghanistan, in Hagerstown, Maryland, U.S., August 18, 2017. REUTERS/Kevin Lamarque

A Secret Service agent keeps watch as Marine One prepares for liftoff, to take U.S. President Donald Trump and his staff to nearby Camp David to meet with the National Security Council to try to agree on a strategy for Afghanistan, in Hagerstown, Maryland, U.S., August 18, 2017. REUTERS/Kevin Lamarque

A long exposure photograph shows the SpaceX Falcon 9 lifting off (L) from its launch pad and then returning to a landing zone (R) at the Cape Canaveral Air Force Station, on the launcher's first mission since a June failure, in Cape Canaveral, Florida, December 21, 2015. The rocket carried a payload of eleven satellites owned by Orbcomm, a New Jersey-based communications company. This long exposure photograph was made by covering the lens in between liftoff and landing. REUTERS/Mike Brown TPX IMAGES OF THE DAY

The Russian Progress-M spacecraft is set on its launch pad at Baikonur cosmodrome, Kazakhstan, July 1, 2015. An unmanned SpaceX rocket exploded about two minutes after liftoff from Florida on Sunday, destroying a cargo ship bound for the International Space Station in the latest in a string of mishaps in supplying the orbiting outpost. A Russian Progress cargo ship failed to reach the outpost in April following a problem with its Soyuz launcher. Russia hopes to return its troubled Soyuz rocket and Progress cargo ship to flight on Friday. REUTERS/Stringer

The Russian Progress-M spacecraft is lifted on its launch pad at Baikonur cosmodrome, Kazakhstan, July 1, 2015. An unmanned SpaceX rocket exploded about two minutes after liftoff from Florida on Sunday, destroying a cargo ship bound for the International Space Station in the latest in a string of mishaps in supplying the orbiting outpost. A Russian Progress cargo ship failed to reach the outpost in April following a problem with its Soyuz launcher. Russia hopes to return its troubled Soyuz rocket and Progress cargo ship to flight on Friday. REUTERS/Stringer

The Russian Progress-M spacecraft is transported to its launch pad at Baikonur cosmodrome, Kazakhstan, July 1, 2015. An unmanned SpaceX rocket exploded about two minutes after liftoff from Florida on Sunday, destroying a cargo ship bound for the International Space Station in the latest in a string of mishaps in supplying the orbiting outpost. A Russian Progress cargo ship failed to reach the outpost in April following a problem with its Soyuz launcher. Russia hopes to return its troubled Soyuz rocket and Progress cargo ship to flight on Friday. REUTERS/Stringer

Employees work on a Russian Progress-M spacecraft (R, front) during the preparations for the upcoming launch at Baikonur cosmodrome, Kazakhstan, June 29, 2015. An unmanned SpaceX rocket exploded about two minutes after liftoff from Florida on Sunday, destroying a cargo ship bound for the International Space Station in the latest in a string of mishaps in supplying the orbiting outpost. A Russian Progress cargo ship failed to reach the outpost in April following a problem with its Soyuz launcher. Russia hopes to return its troubled Soyuz rocket and Progress cargo ship to flight on Friday. REUTERS/Stringer

Employees work on a Russian Progress-M spacecraft during the preparations for the upcoming launch at Baikonur cosmodrome, Kazakhstan, June 29, 2015. An unmanned SpaceX rocket exploded about two minutes after liftoff from Florida on Sunday, destroying a cargo ship bound for the International Space Station in the latest in a string of mishaps in supplying the orbiting outpost. A Russian Progress cargo ship failed to reach the outpost in April following a problem with its Soyuz launcher. Russia hopes to return its troubled Soyuz rocket and Progress cargo ship to flight on Friday. REUTERS/Stringer

Employees work on a Russian Progress-M spacecraft during the preparations for the upcoming launch at Baikonur cosmodrome, Kazakhstan, June 29, 2015. An unmanned SpaceX rocket exploded about two minutes after liftoff from Florida on Sunday, destroying a cargo ship bound for the International Space Station in the latest in a string of mishaps in supplying the orbiting outpost. A Russian Progress cargo ship failed to reach the outpost in April following a problem with its Soyuz launcher. Russia hopes to return its troubled Soyuz rocket and Progress cargo ship to flight on Friday. REUTERS/Stringer

Mike Suffredini, NASA manager of the International Space Station Program speaks at a media event after an unmanned Space Exploration Technologies (SpaceX) Falcon 9 rocket broke apart after liftoff in Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff from Cape Canaveral Air Force Station on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Mike Brown

Mike Suffredini, NASA manager of the International Space Station Program speaks at a media event after an unmanned Space Exploration Technologies (SpaceX) Falcon 9 rocket broke apart after liftoff in Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff from Cape Canaveral Air Force Station on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Mike Brown

An unmanned SpaceX Falcon 9 rocket launches from Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Mike Brown

An unmanned SpaceX Falcon 9 rocket explodes after liftoff from Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Mike Brown TPX IMAGES OF THE DAY

An unmanned SpaceX Falcon 9 rocket explodes after lift-off from Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Mike Brown

An unmanned Space Exploration Technologies Falcon 9 rocket launches in Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff from Cape Canaveral Air Force Station on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Michael Berrigan

An unmanned Space Exploration Technologies Falcon 9 rocket launches in Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff from Cape Canaveral Air Force Station on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Michael Berrigan

An unmanned Space Exploration Technologies Falcon 9 rocket launches in Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff from Cape Canaveral Air Force Station on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Michael Berrigan

An unmanned Space Exploration Technologies Falcon 9 rocket launches in Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff from Cape Canaveral Air Force Station on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Michael Berrigan

An unmanned Space Exploration Technologies Falcon 9 rocket launches in Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff from Cape Canaveral Air Force Station on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Michael Berrigan

An unmanned Space Exploration Technologies Falcon 9 rocket launches in Cape Canaveral, Florida, June 28, 2015. The rocket exploded about two minutes after liftoff from Cape Canaveral Air Force Station on Sunday, destroying a cargo ship bound for the International Space Station, NASA said. REUTERS/Michael Berrigan

SpaceX workers examine the unmanned Falcon 9 rocket carrying NOAA's (National Oceanic and Atmospheric Administration) Deep Space Climate Observatory Satellite as it lays horizontally on launch complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Florida February 9, 2015. Launch of the SpaceX rocket with a U.S. weather satellite bound for deep space was called off minutes before liftoff on Sunday due to a technical problem, officials said. Launch had been targeted for 6:10 p.m. EST (2310 GMT) from Cape Canaveral Air Force Station in Florida. But about 2.5 minutes before liftoff, a problem cropped up with an Air Force radar system needed to track the rocket in flight. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

SpaceX workers examine the unmanned Falcon 9 rocket carrying NOAA's (National Oceanic and Atmospheric Administration) Deep Space Climate Observatory Satellite as it lays horizontally on launch complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Florida February 9, 2015. Launch of the SpaceX rocket with a U.S. weather satellite bound for deep space was called off minutes before liftoff on Sunday due to a technical problem, officials said. Launch had been targeted for 6:10 p.m. EST (2310 GMT) from Cape Canaveral Air Force Station in Florida. But about 2.5 minutes before liftoff, a problem cropped up with an Air Force radar system needed to track the rocket in flight. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

SpaceX workers examine the unmanned Falcon 9 rocket carrying NOAA's (National Oceanic and Atmospheric Administration) Deep Space Climate Observatory Satellite as it lays horizontally on launch complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Florida February 9, 2015. Launch of the SpaceX rocket with a U.S. weather satellite bound for deep space was called off minutes before liftoff on Sunday due to a technical problem, officials said. Launch had been targeted for 6:10 p.m. EST (2310 GMT) from Cape Canaveral Air Force Station in Florida. But about 2.5 minutes before liftoff, a problem cropped up with an Air Force radar system needed to track the rocket in flight. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket being launched by SpaceX on a cargo resupply service mission to the International Space Station sits on the launch pad after an aborted liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 6, 2015. The launch was called off at the last minute on Tuesday due to a potential technical glitch with the booster's upper-stage motor, NASA said. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket being launched by SpaceX on a cargo resupply service mission to the International Space Station sits on the launch pad after an aborted liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 6, 2015. The launch was called off at the last minute on Tuesday due to a potential technical glitch with the booster's upper-stage motor, NASA said. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket being launched by SpaceX on a cargo resupply service mission to the International Space Station sits on the launch pad after an aborted liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 6, 2015. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket being launched by SpaceX on a cargo resupply service mission to the International Space Station sits on the launch pad after an aborted liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 6, 2015. REUTERS/Steve Nesius (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket being launched by SpaceX on a cargo resupply service mission to the International Space Station sits on the launch pad after an aborted liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 6, 2015. REUTERS/Steve Nesius (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket being launched by SpaceX on a cargo resupply service mission to the International Space Station sits on the launch pad after an aborted liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 6, 2015. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The unmanned Falcon 9 rocket launched by SpaceX on a cargo resupply service mission to the International Space Station waits on the launch pad before liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida January 6, 2015. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The Delta IV Heavy rocket carrying the Orion spacecraft sits on the launch pad awaiting liftoff in the sunrise at the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. REUTERS/Mike Brown (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

Two U.S. military helicopters make their way past the launch pad of the Delta IV Heavy rocket with the Orion spacecraft waiting for liftoff from the Cape Canveral Air Force Station in Cape Canaveral, Florida December 4, 2014. The launch of NASA's deep-space Orion capsule on a test flight around Earth was delayed on Thursday after a last-minute technical problem with its rocket, NASA said. REUTERS/Mike Brown (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The Delta IV Heavy rocket carrying the Orion spacecraft awaits liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. The launch of NASA's deep-space Orion capsule on a test flight around Earth was delayed on Thursday after a last-minute technical problem with its rocket, NASA said. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The Delta IV Heavy rocket carrying the Orion spacecraft awaits liftoff from the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. The launch of NASA's deep-space Orion capsule on a test flight around Earth was delayed on Thursday after a last-minute technical problem with its rocket, NASA said. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The Delta IV Heavy rocket carrying the Orion spacecraft sits on the launch pad awaiting liftoff in the sunrise at the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. REUTERS/Steve Nesius (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The Delta IV Heavy rocket carrying the Orion spacecraft sits on the launch pad awaiting liftoff in the sunrise at the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. REUTERS/Steve Nesius (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The Delta IV Heavy rocket carrying the Orion spacecraft sits on the launch pad awaiting liftoff in the early morning light at the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. REUTERS/Steve Nesius (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

The Delta IV Heavy rocket carrying the Orion spacecraft sits on the launch pad awaiting liftoff in the sunrise at the Cape Canaveral Air Force Station in Cape Canaveral, Florida December 4, 2014. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

News photographers and journalists watch as the sun rises on the Delta IV Heavy rocket carrying the Orion spacecraft waiting for liftoff on the launch pad from the Cape Canveral Air Force Station in Cape Canaveral, Florida December 4, 2014. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)

News photographers and journalists watch as the sun rises on the Delta IV Heavy rocket carrying the Orion spacecraft waiting for liftoff on the launch pad from the Cape Canveral Air Force Station in Cape Canaveral, Florida December 4, 2014. REUTERS/Scott Audette (UNITED STATES - Tags: SCIENCE TECHNOLOGY TRANSPORT)