Photographers reset remote cameras inside Pad39A as the SpaceX Crew Dragon spacecraft sits atop a Falcon 9 booster rocket at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft sits atop a Falcon 9 booster rocket on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft sits atop a Falcon 9 booster rocket on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft, atop a Falcon 9 booster rocket, is connected to the crew access arm and launch tower on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft, atop a Falcon 9 booster rocket, is connected to the crew access arm and launch tower on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

A media crew prepares for the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

Flags flutter during a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

NASA administrator Jim Bridenstine (L) walks with KSC director Bob Cabana following a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

Astronauts Kjell Lindgren (L) and Nicole Mann listen as NASA administrator Jim Bridenstine talks to the media during a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

NASA administrator Jim Bridenstine talks to the media during a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

NASA administrator Jim Bridenstine attends a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

Astronaut Kjell Lindgren listens as KSC director Bob Cabana talks during prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

Astronaut Kjell Lindgren, NASA administrator Jim Bridenstine, astronaut Nicole Mann and NASA deputy administrator Jim Morhard attend a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

Astronaut Kjell Lindgren listens as NASA administrator Jim Bridenstine talks to the media during a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

Astronaut Nicole Mann talks to the media, as fellow astronaut Kjell Lindgren looks on, during a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

NASA administrator Jim Bridenstine (R) listens as KSC director Bob Cabana talks to the media during a prelaunch briefing before the launch of the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

Astronaut Kjell Lindgren (L-R), NASA administrator Jim Bridenstine, astronaut Nicole Mann and KSC director Bob Cabana arrive for a prelaunch briefing for the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

Astronaut Kjell Lindgren (L-R), NASA administrator Jim Bridenstine, astronaut Nicole Mann and KSC director Bob Cabana arrive for a prelaunch briefing for the SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket from Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

A restaurant sign referring to the upcoming launch of SpaceX's Crew Dragon capsule to the International Space Station aboard a Falcon 9 rocket, at the Kennedy Space Center is seen nearby Titusville, Florida, U.S., May 29, 2020. REUTERS/Thom Baur

The SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket sits at sunrise on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket sits at sunrise on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket sits at sunrise on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket sits at sunrise on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket sits at sunrise on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket sits at sunrise on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket sits at sunrise on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon spacecraft on a Falcon 9 booster rocket sits at sunrise on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 29, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon on a Falcon 9 booster rocket sits on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 28, 2020. REUTERS/Steve Nesius

The SpaceX Crew Dragon on a Falcon 9 booster rocket sits on Pad39A at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 28, 2020. REUTERS/Steve Nesius

A worker walks past safely spaced desks following safe distancing measures amid the spread of the coronavirus disease (COVID-19) outbreak, at the Seshegong secondary school in Olivenhoutbosch, South Africa, May 28, 2020. REUTERS/Siphiwe Sibeko

The signatures of U.S. President Donald Trump and first lady Melania Trump are seen on a part of the Orion capsule hatch that will be used for the Artemis II mission, during a tour of the Neil Armstrong Operations and Checkout Facility at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 27, 2020. Picture taken May 27, 2020. REUTERS/Jonathan Ernst

The signatures of U.S. President Donald Trump and first lady Melania Trump are seen on a part of the Orion capsule that will fly on the Artemis 1 mission around the moon, during a tour of the Neil Armstrong Operations and Checkout Facility at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 27, 2020. Picture taken May 27, 2020. REUTERS/Jonathan Ernst

A view of emergency workers near a Cub supermarket from a nearby vacant and damaged retail space near the Minneapolis Police third precinct after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S. May 28, 2020. REUTERS/Nicholas Pfosi

A combination picture shows businesswoman Mable Selina Etambo 39, looking at her phone as seen through the window of her mud-walled house, and a view seen from her window, as authorities around the world impose various guidelines on lockdowns and social distancing to curb the spread of coronavirus disease (COVID-19), in Kibera slums, Kenya May 25, 2020. When asked, what will you miss most about being in lockdown? Mable Selina Etambo replied: " I will miss my space because we are a very social society. COVID has made me realise that I need time to sit alone, reflect and plan my life without people bothering me". Picture taken May 25, 2020. REUTERS/Thomas Mukoya

Businesswoman Mable Selina Etambo 39, looks at her phone as seen through the window of her mud-walled house, as authorities around the world impose various guidelines on lockdowns and social distancing to curb the spread of coronavirus disease (COVID-19), in Kibera slums, Kenya May 25, 2020. When asked, what will you miss most about being in lockdown? Mable Selina Etambo replied: " I will miss my space because we are a very social society. COVID has made me realise that I need time to sit alone, reflect and plan my life without people bothering me". Picture taken May 25, 2020. REUTERS/Thomas Mukoya

Donald Trump Jr., his girlfriend Kimberley Guilfoyle and one of his children walk across the tarmac departing Air Force One after flying back to Washington from the Kennedy Space Center in Florida with his father President Donald Trump at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

U.S. President Donald Trump and first lady Melania Trump deplane from Air Force One as they return to Washington after travel to the Kennedy Space Center in Florida at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

U.S. President Donald Trump deplanes from Air Force One as he returns to Washington after travel to the Kennedy Space Center in Florida at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

U.S. President Donald Trump and first lady Melania Trump deplane from Air Force One as they return to Washington after travel to the Kennedy Space Center in Florida at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

U.S. President Donald Trump and first lady Melania Trump deplane from Air Force One as they return to Washington after travel to the Kennedy Space Center in Florida at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

U.S. President Donald Trump and first lady Melania Trump deplane from Air Force One as they return to Washington after travel to the Kennedy Space Center in Florida at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

U.S. President Donald Trump deplanes from Air Force One as he returns to Washington after travel to the Kennedy Space Center in Florida at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

U.S. President Donald Trump and first lady Melania Trump exit the Marine One helicopter behind a U.S. Secret Service agent wearing a protective face mask because of the coronavirus disease (COVID-19) pandemic, as they return from travel to the Kennedy Space Center in Florida, on the South Lawn of the White House in Washington, U.S., May 27, 2020. REUTERS/Leah Millis

White House senior advisers Jared Kushner and Ivanka Trump and their son Joseph wear protective face masks as they walk away from Air Force One returning to Washington with her father U.S. President Donald Trump after travel to the Kennedy Space Center in Florida during the coronavirus disease (COVID-19) pandemic at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

White House senior advisers Jared Kushner and Ivanka Trump and their son Joseph wear protective face masks as they walk away from Air Force One returning to Washington with her father U.S. President Donald Trump after travel to the Kennedy Space Center in Florida during the coronavirus disease (COVID-19) pandemic at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

U.S. President Donald Trump and first lady Melania Trump exit the Marine One helicopter behind a U.S. Secret Service agent wearing a protective face mask because of the coronavirus disease (COVID-19) pandemic, as they return from travel to the Kennedy Space Center in Florida, on the South Lawn of the White House in Washington, U.S., May 27, 2020. REUTERS/Leah Millis

White House senior advisers Jared Kushner and Ivanka Trump and their son Joseph wear protective face masks they follow a U.S. Secret Service agent away from Air Force One returning to Washington with her father U.S. President Donald Trump after travel to the Kennedy Space Center in Florida during the coronavirus disease (COVID-19) pandemic at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

Ivanka Trump wears a protective face mask as she deplanes from Air Force One returning to Washington with her father U.S. President Donald Trump after travel to the Kennedy Space Center in Florida during the coronavirus disease (COVID-19) pandemic at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

Ivanka Trump wears a protective face mask as she deplanes from Air Force One returning to Washington with her father U.S. President Donald Trump, after traveling to the Kennedy Space Center in Florida during the coronavirus disease (COVID-19) pandemic, at Joint Base Andrews, Maryland, U.S. May 27, 2020. REUTERS/Jonathan Ernst TPX IMAGES OF THE DAY

U.S. President Donald Trump and first lady Melania Trump deplane from Air Force One as they return to Washington after travel to the Kennedy Space Center in Florida at Joint Base Andrews, Maryland, U.S., May 27, 2020. REUTERS/Jonathan Ernst

A screen showing the countdown clock is seen with SpaceX Falcon 9 rocket and Crew Dragon spacecraft in the background as launch from NASA's Kennedy Space Center was scrubbed, in Cape Canaveral, Florida, U.S. May 27, 2020. REUTERS/Steve Nesius

The signatures of U.S. President Donald Trump and first lady Melania Trump are seen on a part of a spaceship assembly during a tour of the Neil Armstrong Operations and Checkout Facility at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 27, 2020. REUTERS/Jonathan Ernst

The SpaceX Falcon 9 rocket and Crew Dragon spacecraft are seen on their launch pad as viewed from the area reserved for U.S. President Trump to watch their launch from atop "Operational Support Building 2" after the launch was scrubbed and delayed due to bad weather at the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 27, 2020. REUTERS/Jonathan Ernst

People wait to watch the launch of a SpaceX Falcon 9 rocket and Crew Dragon spacecraft carrying NASA astronauts Douglas Hurley and Robert Behnken during the NASA's SpaceX Demo-2 mission to the International Space Station from NASA's Kennedy Space Center before the launched was called off due to threatening weather conditions in Cape Canaveral, Florida, U.S. May 27, 2020. REUTERS/ Scott Audette

A man fishes as people wait to watch the launch of a SpaceX Falcon 9 rocket and Crew Dragon spacecraft carrying NASA astronauts Douglas Hurley and Robert Behnken during the NASA's SpaceX Demo-2 mission to the International Space Station from NASA's Kennedy Space Center before the launched was called off due to threatening weather conditions in Cape Canaveral, Florida, U.S. May 27, 2020. REUTERS/ Scott Audette

A screen showing the countdown is seen as SpaceX Falcon 9 rocket and Crew Dragon spacecraft launch from NASA's Kennedy Space Center was scrubbed, in Cape Canaveral, Florida, U.S. May 27, 2020. REUTERS/Steve Nesius

People wait to watch the launch of a SpaceX Falcon 9 rocket and Crew Dragon spacecraft carrying NASA astronauts Douglas Hurley and Robert Behnken during the NASA's SpaceX Demo-2 mission to the International Space Station from NASA's Kennedy Space Center before the launched was called off due to threatening weather conditions in Cape Canaveral, Florida, U.S. May 27, 2020. REUTERS/ Scott Audette

People wait to watch the launch of a SpaceX Falcon 9 rocket and Crew Dragon spacecraft carrying NASA astronauts Douglas Hurley and Robert Behnken during the NASA's SpaceX Demo-2 mission to the International Space Station from NASA's Kennedy Space Center before the launched was called off due to threatening weather conditions in Cape Canaveral, Florida, U.S. May 27, 2020. REUTERS/ Scott Audette

People wait to watch the launch of a SpaceX Falcon 9 rocket and Crew Dragon spacecraft carrying NASA astronauts Douglas Hurley and Robert Behnken during the NASA's SpaceX Demo-2 mission to the International Space Station from NASA's Kennedy Space Center before the launched was called off due to threatening weather conditions in Cape Canaveral, Florida, U.S. May 27, 2020. REUTERS/ Scott Audette

White House senior advisers Ivanka Trump and her husband Jared Kushner wear protective face masks as they walk down the steps of Air Force One in the rain with their daughter Arabella Kushner arriving with U.S. President Donald Trump to visit the Kennedy Space Center in Cape Canaveral, Florida, U.S., May 27, 2020. REUTERS/Jonathan Ernst