Ernesto Guido writes "Two small asteroids (2010 RF12 & 2010 RX30) will pass within the Moon's distance of Earth today, September 08, 2010." One is 6-14 meters and the other is 10-20, so even if they change course, don't expect Bruce Willis to be called in.
One has to look out for engineers -- they begin with sewing machines
and end up with the atomic bomb.
-- Marcel Pagnol