U.S. President Barack Obama tours the Colosseum in Rome on Thursday, March 27. Click through to see other photos from Obama's trip to Europe this week.
Obama's European tour —
U.S. President Barack Obama tours the Colosseum in Rome on Thursday, March 27. Click through to see other photos from Obama's trip to Europe this week.
Pablo Martinez Monsivais/AP
President Obama meets Pope Francis at the Vatican on March 27.
Obama's European tour —
President Obama meets Pope Francis at the Vatican on March 27.
Gabriel Bouys/AFP/Pool/AP
Obama is flanked by Belgium's King Philippe, right, and Belgian Prime Minister Elio Di Rupo as he delivers an address in Waregem, Belgium, on Wednesday, March 26.
Obama's European tour —
Obama is flanked by Belgium's King Philippe, right, and Belgian Prime Minister Elio Di Rupo as he delivers an address in Waregem, Belgium, on Wednesday, March 26.
BENOIT DOPPAGNE/EPA/LANDOV
Obama, gesturing in the bottom left, joins other world leaders for a group photo on the last day of the Nuclear Security Summit in The Hague, Netherlands, on Tuesday, March 25. The summit was the primary reason for Obama's trip.
Obama's European tour —
Obama, gesturing in the bottom left, joins other world leaders for a group photo on the last day of the Nuclear Security Summit in The Hague, Netherlands, on Tuesday, March 25. The summit was the primary reason for Obama's trip.
Robin van Lonkhuijsen/Pool/AP
Obama disembarks from Air Force One after arriving in Amsterdam, Netherlands, on Monday, March 24.
Obama's European tour —
Obama disembarks from Air Force One after arriving in Amsterdam, Netherlands, on Monday, March 24.
Peter DeJong/AFP/Getty Images
A U.S. helicopter squadron transports Obama to the Rijksmuseum in Amsterdam on March 24.
Obama's European tour —
A U.S. helicopter squadron transports Obama to the Rijksmuseum in Amsterdam on March 24.
Olaf Kraak/Landov
Obama and Dutch Prime Minister Mark Rutte hold a news conference in front of Rembrandt's "The Night Watch" following meetings at the Rijksmuseum on March 24.
Obama's European tour —
Obama and Dutch Prime Minister Mark Rutte hold a news conference in front of Rembrandt's "The Night Watch" following meetings at the Rijksmuseum on March 24.
Jerry Lampen/AFP/Getty Images
Obama and Chinese President Xi Jinping meet in The Hague, Netherlands, on March 24 ahead of the Nuclear Security Summit.
Obama's European tour —
Obama and Chinese President Xi Jinping meet in The Hague, Netherlands, on March 24 ahead of the Nuclear Security Summit.
Saul Loeb/AFP/Getty Images
Obama attends the opening session of the Nuclear Security Summit on March 24.
Obama's European tour —
Obama attends the opening session of the Nuclear Security Summit on March 24.
Yves Herman/Getty Images
Obama gathers with G7 world leaders in The Hague on March 24.
Obama's European tour —
Obama gathers with G7 world leaders in The Hague on March 24.
JerryLampen/Pool/AP