At a nearby mosque, Mohammed Ayesh, a Muslim religious official in Bethlehem, issued a plea to Obama in a speech to worshippers: "America, where are your values? Where are the human rights? Isn't it time that you interfere to make it stop?"
Amid high security, Obama toured the church with Palestinian Authority President Mahmoud Abbas. They stopped at the Grotto of the Nativity, which is said to stand where Jesus Christ was born. About 20 children waving U.S. and Palestinian flags greeted Obama in a courtyard outside the sanctuary. He posed for photographs with Abbas and Bethlehem's mayor, Vera Baboun.
Earlier in Jerusalem, Obama and his Israeli hosts arrived at the somber Herzl grave site under cloudless skies. Obama approached Herzl's resting place alone and bowed his head in silence. He turned briefly to ask Netanyahu where to place a small stone in the Jewish custom, then laid the stone atop the grave.
"It is humbling and inspiring to visit and remember the visionary who began the remarkable establishment of the State of Israel," Obama wrote in the Mt. Herzl guestbook. "May our two countries possess the same vision and will to secure peace and prosperity for future generations."
At Rabin's grave a short walk away, Obama was greeted by members of Rabin's family. He initially placed a stone on Rabin's wife's side of the grave, then returned to place one atop Rabin's side. In a gesture linking the U.S. and Israel, the stone placed on Rabin's grave was from the grounds of the Martin Luther King memorial in Washington, the White House said.
Rabin, Obama told family members, was "a great man."
Chatting with the family, Obama joked that "Bibi arranged for perfect weather," using Netanyahu's familiar name. He then added that "Shimon plied me with wine" at the official state dinner Thursday evening. At one point the talk turned to the singer who performed at the dinner, and Obama pointed out that he was known to sing, too. "They had me on YouTube," he said with a laugh. "Check it out -- Obama singing Al Green."
At Yad Vashem, Obama donned a skull cap and was accompanied by Rabbi Israel Meir Lau, a survivor of the Buchenwald Concentration camp who lost both parents in the Holocaust. Among his stops was Yad Vashem's Hall of Names, a circular chamber that contains original testimony documenting every Holocaust victim ever identified.
"Nothing could be more powerful," Obama said.