As we approach the 45th anniversary of the monumental Apollo 11 expedition, which saw the first humans walk on the moon, Buzz Aldrin shared a picture of the crew — including Neil Armstrong and Michael Collins — meeting with President Richard Nixon upon their return.

WhoSay - image from Buzz Aldrin

Buzz, who is now 84, explained that as a way of honoring the trio for their service to the United States, every U.S. president has met with the astronauts since 1969.

Below are a few pictures from those White House meetings!

With President Bill Clinton in 1994

bill clinton

With President George W. Bush in 2004

george bush

With President Barack Obama in 2009

barack obama