Written by Matthew Harper. Media by Bobby Williams. The Boston Marathon is an annual tradition dating back to 1897, making it the oldest such contest in the world. Every year thousands of people make their way to Boston from around the world to participate in the event and, until Monday, it had usually been a joyous event. Shortly before 3pm Eastern time, two blasts went off near the finish line of the marathon. The explosions have left 3 people dead, 176 injured, and an entire nation searching for answers. Contrary to reports that circulated shortly after the explosions Monday afternoon, no additional explosive devices were found. President Barack Obama has called the attack an act of terror, but there are no clear leads as of this time and no arrests have been made.