Video of Explosion at Boston Marathon and Boston Police Scanner Audio

Two explosions occurred this afternoon near the finish line of the Boston Marathon.  Live video and the first uploads from YouTube and Vine vids are below.

Audio of the Boston Police Department scanner traffic

This is a live stream from CBS Boston
CBS Boston Live Stream Social Media videos From Vine:

From YouTube

Second Explosion along Boylston Street at Boston Marathon

Longer video from the Boston Globe