Police, fire and other emergency vehicles swarmed the White House grounds in the pre-dawn hours, with several clustered near the southeast entrance to the mansion when the object was found. The White House reported that the drone — a 2-foot “quad copter” — posed no immediate danger to the building or the president, who’s in India with First Lady Michelle Obama. The White House was dark and the entire perimeter was on lockdown until around 5 a.m.