18th, a giant space rock exploded 16 miles above the earth. it had ten times the centering of the heiroshima atomic bomb. nasa calls it fireballs. it was the second most powerful in 30 years. na nasa s planetary defense officer says fireballs this powerful only happen a few times this century. and this is not the kind of bracket bust espn had in mind. the network apologizing after it accidently aired brackets for the women s basketball tournament hours before the scheduled release. you can see them on the right side of the screen midday monday. espn says in the midst of our preparation the bracket was mistakenly posted on espn democrat accept