
Aaron Tang says he witnessed the first of the Boston Marathon bombings through a window from his office, about half a block from the finish line. "(There was a) big blast of fire, and smoke, but it all vanished so fast and (there's) not much left to see minus lots of shattered glass," he wrote on Flickr. The following images are what he saw on April 15, 2013.

Kenyan runner Rita Jeptoo, who finished first in the women's race, makes her way toward the finish line.

Children watch the race from a window.

Officers enter the crowd.

Tang's view from his window.

Ethiopian runner Lelisa Desisa, who won the men's marathon, reaches the finish line.

A herd of photographers captures the big race.

Runners pass by.

Smoke fills the air after an explosion.

People appear to panic.

Bystanders clear the area.

Smoke fills the surrounding area.

People help the injured.

Officers help clear the area.

Injured people lie on the ground.

Workers clear a fence.

Officers and others help the injured.

Officers continue to help.

An injured person receives help.

Glass and blood cover the ground.

Officers scan the scene.

Debris covers the ground.

