Notes from the White House pool report:

President Obama observed a moment of silence on the South Lawn of the White House at at 11 a.m. on Monday morning to honor the victims of the shooting Saturday in Tucson, Ariz.
At exactly 11 a.m., the president and First Lady walked onto South Lawn, POTUS in long black coat, first lady in purple coat. More than 200 White House staffers had already assembled on each side. Staffers included Axelrod, Cutter, Sperling, Messina. Flag was at half-staff. In the brief ceremony, a chime rang three times, then Obamas and staffers bowed their heads and closed their eyes. After almost exactly one minute, they turned and walked back in the White House with their arms around one another. The staffers then headed back to White House and EEOB.