Apollo 11 astronaut returns to launch pad 50 years later

Model rockets are launched at the U.S. 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)
Apollo 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)
Apollo 11 astronaut Mike Collins, answers questions during a news conference Tuesday, July 16, 2019, in Cocoa Beach, Fla. (AP Photo/John Raoux)
Apollo 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)
Model rockets are launched at the U.S. 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)
This March 30, 1969 photo made available by NASA shows the 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. (NASA via AP)
In this Tuesday, July 16, 2019 photo made available by NASA, astronaut 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. (Frank Michaux/NASA via AP)
In this July 20, 2009 file photo, Apollo 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. (AP Photo/Alex Brandon)
This March 30, 1969 photo made available by NASA shows the 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. (NASA via AP)
FILE - In this July 16, 1969 file photo, from 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. (AP Photo/File)
FILE - In this July 16, 1969 file photo, from 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. (AP Photo/File)

CAPE CANAVERAL, Fla. — Apollo 11 astronaut Michael Collins returned Tuesday to the exact spot where he flew to the moon 50 years ago with Neil Armstrong and Buzz Aldrin.