Boston Strong: The Boston Marathon One Year Later

 
A year after tragedy hit their hometown streets, the survivors of the Boston Marathon bombings continue to rebuild, drawing strength from the heroics they saw that day.

The bombing of the Boston Marathon shocked a nation, bloodied a city and stunned its proud police force.

Two men, brothers, it turned out, allegedly were able to walk within yards of the finish line on Boylston Street unchallenged by security, drop two bags containing pressure cooker bombs and stroll away moments before they exploded.

The Boston Marathon, the oldest annual marathon in the world, began today, amid both heightened security and poignancy born of the twin bombings at the finish line a year ago.