It's still a chaotic scene in Boston after the explosion that killed two people and injured 23. In an effort to provide some clarity, the New York Times has produced a map of the scene and initial timeline of the explosions.
The first explosion occurred on the north side of Boylston Street, just before the finish line. About 10 seconds later, the second explosion happened 550 feet away as the runners came in from the west side.
Check out the full map at the Times' site here.