Here's the big picture of the White House with the Ellipse in front of it. It would be somewhat hard for a novice suicide pilot to visually acquire it directly though he could use the Washington Monument and the Ellipse to walk his eyes onto his target. On one of the rooftops next to the White House, they have hidden surface to air missiles, maybe on the Old Executive Building to the left of the White House.

You're looking down 16th Street on the far side of the White House. A few weeks ago, about two blocks down 16th from Lafayette Square at the corner of K Street, within sight of the White House, two wild boys kidnapped at gunpoint a college coed coming home late from her waitressing job. They got another young woman three blocks down the street. Bad things happened. They wanted to use them to set up their own prostitution ring. The girls survived, kinda. The boys got caught.

The predators come out at night in DC. You don't want to be walking around on the deserted DC streets in the dark.