CBS News has acquired a few seconds of footage showing the initial explosion by the finish line of the Boston Marathon. Another explosion went off seconds later about 500 feet from the first, and authorities have found two more explosive devices. 2 are confirmed dead, and around 30 injured, including some who require amputations.
The footage is just seconds long, but it shows the power and size of the blast. CBS News also has some scattered footage of the scene following the blast. Chaos reigned as people fought through dust and debris to find injured people and take them somewhere that they could be helped.