This is a video taken right at the moment that the two bombs exploded near the finish line of the Boston Marathon, today at 2:50pm EDT.
Boston.com viral video page - Boston.com
Two people were killed, including an 8 year old boy, and at least 28 people were injured; some quite severely including lost limbs. There are confirmed reports that they have a suspect in custody; the person is injured and in a Boston hospital under guard.