Witness Ben Thorndike saw Monday's blast at the Boston Marathon from a nearby office building. His sequence of photos, seven shown here, show the moments immediately after the blast.
courtesy Ben Thorndike
After the explosion: Moment-by-moment —
courtesy Ben Thorndike
After the explosion: Moment-by-moment —
courtesy Ben Thorndike
After the explosion: Moment-by-moment —
courtesy Ben Thorndike
After the explosion: Moment-by-moment —
courtesy Ben Thorndike
After the explosion: Moment-by-moment —
courtesy Ben Thorndike
After the explosion: Moment-by-moment —
The image ends the sequence of photos showing the moments immediately after the blast.
