Dzhokhar Tsarnaev spoke in court for the first time since he entered a “not guilty” plea at his arraignment hearing two years ago, expressing remorse for his actions.
Serena Eley of Los Alamos, New Mexico, approaches the finish line of the 2015 Boston Marathon.
James Dixon of San Jose, CA, waves as he nears the finish line of the Boston Marathon.
Lisa Howley celebrates with her medal and a bottle of water after finishing the Boston Marathon.
At the entrance of Arlington Station, marathon cowbells are on sale for $3.00.
On various steps and in shops, pots of daffodils labeled "Boston Strong" line the routes of the 2015 Boston Marathon.
Spectators, lined along the finishing stretch of the marathon in Copley Square, stare down the road in anticipation.
Former Army Ranger Lucas Carr, right, and Stonehill College student Matt Brown, who has been a quadriplegic since he was 15, celebrate as they near the end of the race. The two have run multiple marathons together for charity since 2012.
Under gray skies and rainy weather, a spectator awaits the arrival of her sister with a bouquet of flowers near the finish line.
Carl Tourigny of Victoriaville, Canada gets a fist bump from a volunteer after passing the finish line of the Boston Marathon.
A Boston policeman looks on as runners approach the end of the race. Security was high at the race, with all bags subject to search and many policemen on standby.
Two years after two bombings left the Boston Marathon’s finish line in chaos in 2013, more than a dozen Harvard students, faculty, and affiliates took to the 26.2 mile Marathon course on Monday.