First Responders And Eyewintnesses Struggle To Process What They Saw Following The Bombings At The Boston Marathon

Most of us can only imagine what it's like to witness a tragedy or what we'd do or think if we did. In the wake of the tragic bombing at the Boston Marathon yesterday, eyewitnesses and first responders alike weighed in on what it was like to be at ground zero.

Here's audio from an eyewitness explaining the explosions and aftermath:

This one's a clip of a witness who helped a couple of lost children to safety during the carnage that ensued:

And lastly, a clip of a random bystander recalling what the scene was like as he helped the injured and mortally wounded: