The White House will host Pope Francis on Wednesday, and the pontiff is scheduled to address a joint session of Congress on Thursday before he heads to New York.
Here are more photos of his arrival:
AP
President Barack Obama and first lady Michelle Obama greet Pope Francis upon his arrival at Andrews Air Force Base, Md
REUTERS/Jonathan Ernst
President Barack Obama welcomes Pope Francis to the United States upon his arrival at Joint Base Andrews outside Washington
REUTERS/Tony Gentile
President Barack Obama (C) welcomes Pope Francis to the United States upon his arrival at Joint Base Andrews outside Washington