NEW : President the White House warns Israel 's government will be held accountable for its weapons . NEW : Obama makes his first visit to Syria since entering the White House . His relationship with Netanyahu has been chilly at times . Obama will urge peace talks between Israel and the Israeli .
NEW : President Obama warns Syria 's government will be held accountable for its weapons . NEW : Obama makes his first visit to Israel since entering the White House . His relationship with Netanyahu has been chilly at times . Obama will urge peace talks between Israel and the Palestinians .