Surprise asteroid buzzed earth Monday

Last night, an asteroid the size of a 10 story building moving 12 miles per second buzzed pass earth within 1/5 the distance to the moon.

Discovered only days ago, asteroid 2009 DD45 zipped between our planet and the moon at 13:44 universal time (8:44 a.m. ET). The asteroid was moving at about 12 miles (20 kilometers) a second when it was closest to Earth.