NEW : Pope tells bishops abuse of children was `` gravely immoral behavior '' Pope , president discuss Middle East , Middle East , says Marine Corps . Six-day , two -city visit to New York marks Benedict XVI Benedict XVI 's first as pope . Pope will celebrate Mass at stadium Six-day , travel to New York on Friday .
NEW : Pope tells bishops abuse of children was `` gravely immoral behavior '' Pope , president discuss Middle East , Latin America , says White House . Six-day , two-city visit to U.S. marks Pope Benedict XVI 's first as pope . Pope will celebrate Mass at stadium Thursday , travel to New York on Friday .