A. the meteor sonic boom.
B. atmospheric impact of a small asteroid.
C. an asteroid zooming close by the Earth.
D. flying glass.

A. The meteor explosion over Russia had nothing to do with 2012 DA14 asteroid flyby.
B. It will be about 5,000 miles closer to Earth when 2012 DA14 asteroid passes over Indonesia.
C. 2012 DA14 asteroid pose no threat to Earth during today’s flyby.
D. 2012 DA14 asteroid will not hit Earth for the foreseeable future.