The presidential candidates Thursday set aside politics and to join others in New York to mark the anniversary of the Sept. 11, 2001, terrorist attacks. A ceremony at Ground Zero will include a "Tribute in Light" where the Twin Towers stood, a local newspaper reported. The lights will be on from dusk Thursday until dawn Friday. Democratic and Republican presidential candidates Barack Obama and John McCain will make a joint visit to Ground Zero. U.S. President George Bush and first lady Laura Bush were to participate in a moment of silence at 8:46 a.m., EDT when the first plane struck the North Tower, then travel to the Pentagon for the dedication of the first of the three major Sept. 11 memorials.