WASHINGTON — It could be the only day before Nov. 6 without explicit partisan rancor.

Both President Barack Obama and Republican challenger Mitt Romney plan to take down their negative ads in honor of the 11th anniversary of the 9/11 terrorist attacks. Neither planned to appear at overtly political events, although Election Day is never far from their agendas.

Obama has scheduled a moment of silence at the White House and a trip to the Pentagon, the target of one of four planes al-Qaida hijacked 11 years ago. Romney, meanwhile, is set to address the National Guard, whose members deployed as part of the U.S. response to the attacks.