U.S. President Barack Obama and Palestinian President Mahmoud Abbas walk in the Church of the Nativity during their visit to the West Bank city of Bethlehem on March 22, 2013.

Obama meets Greek Orthodox Patriarch Theophilos III (3rd left) during a tour of the Church of the Nativity.

Obama tours the Hall of Names at the Yad Vashem Holocaust Museum in Jerusalem, alongside Avner Shalev (right), Chairman of the Yad Vashem Directorate, and Israeli Prime Minister Benjamin Netanyahu.

Obama pays his respects in the Hall of Remembrance at Yad Vashem after Marines laid a wreath on his behalf.

Obama listens to Netanyahu during their visit to the Children's Memorial at Yad Vashem.

Obama walks with Rabbi Israel Meir Lau in the Hall of Remembrance at Yad Vashem.

A worshipper prays in the Church of the Nativity, the site revered as the birthplace of Jesus, ahead of Christmas in the West Bank town of Bethlehem on Dec. 21, 2012.

Pilgrims from Italy join a procession through the Church of the Nativity down into the 'Grotto,' traditionally accepted as the birthplace of Jesus Christ, in the West Bank town of Bethlehem on Dec. 21. The church is one of the oldest in the world and pilgrims, tourists and Christian faithful are flocking to the town where Jesus was born in the lead-up to the Christmas festivities.

Palestinians surround a cart carrying a wooden statue of baby Jesus before a march in the West Bank town of Bethlehem on Dec. 20, 2012.

A clay seal recently unearthed by Israeli archaeologists is displayed by Eli Shukron, who directed the excavation on behalf of the Israel Antiquities Authority, just outside Jerusalem's Old City on May 23, 2012.

The tiny clay seal is imprinted with three lines of ancient Hebrew script that include the word "Bethlehem".

A Greek Orthodox monk cleans the Church of the Nativity, believed by many to be the birthplace of Jesus Christ, in the West Bank town of Bethlehem, Wednesday, Dec. 28, 2011.

Greek Orthodox members clean the floor of Church of Nativity, the traditionally accepted birthplace of Jesus Christ, in the West Bank town of Bethlehem, Dec. 28.

Armenian clergymen scuffle with police and Greek Orthodox clergymen during the annual cleaning of the Church of Nativity, the traditionally accepted birthplace of Jesus Christ, in the West Bank town of Bethlehem, Dec.28. Several hundred clergy of different Christian sects, as well as some faithful, pitch in to clean the entire church, one of the oldest in the world, but with special care taken not to overstep one's boundaries and delicate cleaning responsibilities. The entire church is swept, dusted, cleaned with kerosene and covered in sawdust to soak up the flammable liquid as the church is cleaned of all the dirt accumulated in the past year and made ready for the next year's onslaught of pilgrims, clergy and tourists.

Palestinian police officers stand between Armenian Orthodox, left, and Greek Orthodox clergymen, not seen, during the cleaning of the Church of the Nativity, in Bethlehem, Dec. 28.

Left: Santa and Wynonna Judd performs for Make-A-Wish kids & their families at Belle Meade Plantation on Dec. 21, 2011 in Nashville, Tenn.

Right: A man dressed in a Santa Claus suit walks in the Church of the Nativity, the site revered as the birthplace of Jesus, in the West Bank town of Bethlehem on Dec. 22, 2011.

A demonstrator dressed as Santa Claus is arrested by riot policemen during clashes with students who are demanding changes in the public state education system in Santiago, on Dec. 22, 2011. Chilean students have been protesting against what they say is the profiteering in the state education system.