1 / 14Model rockets are launched at the US Space & Rocket Center in Huntsville, Ala., on Tuesday, July 16, 2019, on the 50th anniversary of the Apollo 11 liftoff. Organizers are attempting to break a Guinness World Record by launching 5,000 simultaneously. (Joe Songer/The Huntsville Times - AL.com via AP)
2 / 14Apollo Legends attend a news conference from left, Gerry Griffin, Apollo flight director, and Charlie Duke, Apollo 16 astronaut, take their seats as Mike Collins, Apollo 11 astronaut admires Apollo 9 astronaut Rusty Schweickart's socks featuring a Saturn V rocket, during a news conference Tuesday, July 16, 2019, in Cocoa Beach, Fla. (AP Photo/John Raoux)
3 / 14Apollo 11 astronaut Mike Collins, left, makes comments as Apollo 9 astronaut Rusty Schweickart listens during a news conference Tuesday, July 16, 2019, in Cocoa Beach, Fla. (AP Photo/John Raoux)
4 / 14Apollo 11 astronaut Mike Collins, answers questions during a news conference Tuesday, July 16, 2019, in Cocoa Beach, Fla. (AP Photo/John Raoux)
5 / 14From right, Neil Armstrong, Michael Collins and Buzz Aldrin walk to the van that will take the crew to the launchpad at Kennedy Space Center on Merritt Island, Florida. July 16, 1969. (AP Photo/File)
6 / 14The crew of the Apollo 11, from left, Neil Armstrong, commander; Michael Collins, module pilot; Edwin E. "Buzz" Aldrin, lunar module pilot. Apollo 11 was the first manned mission to the surface of the moon. March 30, 1969. (NASA via AP)
7 / 14Apollo 11 astronauts, from left, Buzz Aldrin, Michael Collins and Neil Armstrong stand in the Oval Office at the White House in Washington, on the 40th anniversary of the mission's moon landing. July 20, 2009. (AP Photo/Alex Brandon)
8 / 14The full moon rises behind the Statue of Liberty at sunset in New York City, Monday, July 15, 2019, on the night before the 50th anniversary of the Apollo 11 moon launch. (AP Photo/J. David Ake)
9 / 14From left, Rick Armstrong, the son of Neil Armstrong, Vice President Mike Pence, and Smithsonian's National Air and Space Museum Director Ellen Stofan, unveil Neil Armstrong's Apollo 11 spacesuit at the Smithsonian's National Air and Space Museum on the National Mall in Washington, Tuesday, July 16, 2019. (AP Photo/Andrew Harnik, Pool)
10 / 14Neil Armstrong's Apollo 11 spacesuit is unveiled at the Smithsonian's National Air and Space Museum on the National Mall in Washington, Tuesday, July 16, 2019. (AP Photo/Andrew Harnik)
11 / 14Neil Armstrong's Apollo 11 spacesuit is unveiled at the Smithsonian's National Air and Space Museum on the National Mall in Washington, Tuesday, July 16, 2019. (AP Photo/Andrew Harnik)
12 / 14Astronaut Michael Collins, right, speaks to Kennedy Space Center Director Bob Cabana at Launch Complex 39A, about the moments leading up to launch at 9:32 a.m. on July 16, 1969, and what it was like to be part of the first mission to land on the moon. Collins was orbiting in the Command Module, while Neil Armstrong and Buzz Aldrin went to the surface in the Lunar Module. July 16, 2019. (Frank Michaux/NASA via AP)
13 / 14Rafiel Santos and Silvia Freddo, and their two children Jose Eduardo, 11, right, and Gustavo, 6, bottom, of Santa Catarina, Brazil, take a selfie as some of the first visitors to view Neil Armstrong's Apollo 11 spacesuit after it is unveiled at the Smithsonian's National Air and Space Museum on the National Mall in Washington, Tuesday, July 16, 2019. (AP Photo/Andrew Harnik)
14 / 14Jack Heely, 5, of Alexandria, Va., wears a toy space helmet as he arrives as one of the first visitors to view Neil Armstrong's Apollo 11 spacesuit, background, after it is unveiled at the Smithsonian's National Air and Space Museum on the National Mall in Washington, Tuesday, July 16, 2019. (AP Photo/Andrew Harnik)
