I was passing near the White House today when this low flying helicopter passes overhead. It landed on the front lawn of the White House, President Obama got in, and it flew away. Here is the underside of President Obama's chopper
EXIF
Exposure: 1/640 sec at f/7.1
Focal Length: 48mm
ISO: 100
Camera: Canon EOS Rebel T1i
Lens: EF-S 18-55mm f/3.5-5.6 IS