NEW : Pope Benedict XVI arrives in Washington for six - day U.S. visit . DC : President Bush , first lady Laura Bush and daughter Laura greet pontiff . Security tight for first papal visit since September 11 attacks . Pope will also visit New York ; will celebrate Mass in both cities .
NEW : Pope Benedict XVI arrives in Washington for six-day U.S. visit . NEW : President Bush , first lady Laura Bush and daughter Jenna greet pontiff . Security tight for first papal visit since September 11 attacks . Benedict will also visit New York ; will celebrate Mass in both cities .