Ethiopian runner says "sport should never be used as a battleground."
Over 5,500 runners who were unable to complete last month's race because of the bombings will get another chance next year.
Images from a day that no one will forget, told from the instant the first bomb exploded.
Singer is expanding on the special connection he has with the city of Boston because of "Sweet Caroline."
Boston's pro athletes shared in the shock of the Boston Marathon explosions aftermath on Twitter.
Unlike last year, conditions are ideal, with temperatures near 50 at the finish.
The road race gets a break from the weather gods this year, with temperatures only in the mid-50s.