Two explosions near the finish line of the Boston Marathon killed three people and injured more than 150 on April 15, 2013. Security tightened in cities across the country as the investigation began.
15 of 58
Army National Guardsman can be seen between two flags hung at a makeshift memorial near the scene of yesterday's bombing in Boston, Massachusetts on April 16, 2013. Security is still high in the city after two bombs detonated on Boylston Street near the finish line of the Boston Marathon Monday afternoon killing 3 and injuring 150. UPI/Matthew Healey
| License Photo
x
Feedback