Former senator Bill Nelson says his wife Grace, standing next to him, is his rock, after being sworn in by Vice President Kamala Harris as NASA's 14th administrator, with guests Pam Melroy, nominee for Deputy NASA Administrator, Charlie Bolden, former NASA Administrator, holding a laptop with former administrator Jim Bridenstine on the screen, his son Bill Jr., and daughter Nan Ellen, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

Former senator Bill Nelson points to the Lunar sample from Apollo 16 collected by astronaut John Young, accompanied by his wife Grace, his son Bill Jr., and his daughter Nan Ellen, after being sworn in by Vice President Kamala Harris as NASA's 14th administrator, with guests Pam Melroy, nominee for Deputy NASA Administrator, and Charlie Bolden, former NASA Administrator, holding a laptop with former administrator Jim Bridenstine on the screen, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris speaks to former administrator Jim Bridenstine on the laptop screen, after swearing in former senator Bill Nelson, as NASA's 14th administrator, accompanied by his wife, Grace, holding the family bible, his son Bill Jr., his daughter Nan Ellen, and guests Pam Melroy, nominee for Deputy NASA Administrator, and Charlie Bolden, former NASA Administrator, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris walks out of the vice president's ceremonial office after the swearing-in of former senator Bill Nelson as NASA's 14th administrator, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris speaks to former administrator Jim Bridenstine on the laptop screen, after swearing in former senator Bill Nelson, as NASA's 14th administrator, accompanied by his wife, Grace, holding the family bible, his son Bill Jr., his daughter Nan Ellen, and guests Pam Melroy, nominee for Deputy NASA Administrator, and Charlie Bolden, former NASA Administrator, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

Former senator Bill Nelson speaks after being sworn in by Vice President Kamala Harris as NASA's 14th administrator, accompanied by his wife, Grace, holding the family bible, his son Bill Jr., his daughter Nan Ellen and guests Pam Melroy, nominee for Deputy NASA Administrator, and Charlie Bolden, former NASA Administrator, holding a laptop with former administrator Jim Bridenstine on the screen, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris stands in the vice president's ceremonial office after the swearing-in of former senator Bill Nelson as NASA's 14th administrator, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris swears in former senator Bill Nelson as NASA's 14th administrator, with his hand on the family bible held by his wife, Grace, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris swears in former senator Bill Nelson as NASA's 14th administrator, with his wife, Grace, holding the family bible, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris swears in former senator Bill Nelson as NASA's 14th administrator, with his hand on the family bible held by his wife, Grace, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris walks into the vice president's ceremonial office ahead of a swearing-in of former senator Bill Nelson as NASA's 14th administrator, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

U.S. Vice President Kamala Harris swears in former senator Bill Nelson as NASA's 14th administrator, with his hand on the family bible held by his wife, Grace, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

Former senator Bill Nelson and his wife, Grace, walk into the vice president's ceremonial office ahead of U.S. Vice President Kamala Harris swearing Nelson in as NASA's 14th administrator, in the Eisenhower Executive Office Building at the White House in Washington, U.S., May 3, 2021. REUTERS/Cheriss May

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Steve Nesius

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Steve Nesius

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

The sky glows as a SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Steve Nesius

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur TPX IMAGES OF THE DAY

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Steve Nesius

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Steve Nesius

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur REFILE - CORRECTING DATE

A SpaceX Falcon 9 rocket, with the Crew Dragon capsule, is launched carrying four astronauts on a NASA commercial crew mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur REFILE - CORRECTING DATE

JAXA astronaut Akihiko Hoshide reacts as he arrives for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

NASA astronauts Shane Kimbrough and Megan McArthur, JAXA astronaut Akihiko Hoshide and ESA astronaut Thomas Pesquet arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

ESA astronaut Thomas Pesquet, NASA astronauts Shane Kimbrough and Megan McArthur, and JAXA astronaut Akihiko Hoshide arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A Tesla carrying the SpaceX Crew Dragon 2 astronauts passes the VAB on its way to Pad 39A for a mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Thom Baur

NASA astronaut Megan McArthur gives her son, Theodore Behnken and husband, Bob Behnken who is also an astronaut, a virtual hug as she arrives for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

A Tesla carrying the SpaceX Crew Dragon 2 astronauts passes the VAB on its way to Pad 39A for a mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Steve Nesius

A Tesla carrying the SpaceX Crew Dragon 2 astronauts passes the VAB on its way to Pad 39A for a mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Steve Nesius

A Tesla carrying the SpaceX Crew Dragon 2 astronauts passes the VAB on its way to Pad 39A for a mission to the International Space Station at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Steve Nesius

NASA astronauts Shane Kimbrough and Megan McArthur, JAXA astronaut Akihiko Hoshide and ESA astronaut Thomas Pesquet arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

ESA astronaut Thomas Pesquet, NASA astronauts Shane Kimbrough and Megan McArthur, and JAXA astronaut Akihiko Hoshide arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

NASA astronauts Shane Kimbrough and Megan McArthur, JAXA astronaut Akihiko Hoshide and ESA astronaut Thomas Pesquet arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

NASA astronauts Shane Kimbrough and Megan McArthur, JAXA astronaut Akihiko Hoshide and ESA astronaut Thomas Pesquet arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper TPX IMAGES OF THE DAY

ESA astronaut Thomas Pesquet arrives for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

NASA astronauts Shane Kimbrough and Megan McArthur arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

ESA astronaut Thomas Pesquet arrives for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

ESA astronaut Thomas Pesquet and JAXA astronaut Akihiko Hoshide arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper

NASA astronauts Shane Kimbrough and Megan McArthur, JAXA astronaut Akihiko Hoshide and ESA astronaut Thomas Pesquet arrive for the boarding of the SpaceX Falcon 9 rocket with the Crew Dragon capsule, before the launch of the NASA commercial crew mission at Kennedy Space Center in Cape Canaveral, Florida, U.S., April 23, 2021. REUTERS/Joe Skipper