Speaking at a press conference with Jordan's King Abdullah, a key Middle East ally, Obama also said he welcomed Abdullah's moves toward "necessary" political reforms in his country.
Abdullah said he would refuse to close Jordan's borders to Syrian refugees, and Obama said he was concerned Syria could become an enclave for extremists.
President Barack Obama set aside Middle East politics today to marvel at the beauty of the ancient archaeological city of Petra.
For all the warm words from the Barack Obama during his trip to Israel this week, an Israeli apology might have the most lasting impact.
President Obama appealed to young Israelis to pursue the path of peace with the Palestinians, during his visit to Israel.