A runner wears an awesome message on his shirt.
A runner shows his support for the victims with a unique haircut.
Marathon runner Iwan Thomas shows off his “Run 4 Boston” socks.
Fans display a banner at a bridge that overlooks the Marathon course showing support for Boston.
A runner with a Boston marathon t-shirt running in London.
A runner places his hand over his heart as a tribute for the Boston Marathon bombing victims.
Messages of encouragement and love left on a wall in London for the Boston Marathon bombing victims.
A young girl wears a t-shirt to honor those who died during Boston Marathon bombing.
London Marathon runner Tricia Bun shows on her sign of support for Boston before the race.
A runner carrying an American flag passes the shadows of London Marathon fans.
A fan holds a sign in support of Boston.
A photo of the moment of silence.
Runners stand in silence to pay tribute to the victims.
Runner commemorate the Boston victims during the moment of silence.
A runner wears his black ribbon in remembrance of the Boston bombing victims.
A member of staff wears a black ribbon in memory of Boston Marathon bombings during the London Marathon.
People write on a wall of encouragement, the wall had many pictures for victims of the Boston Marathon bombing.
A runner shows his support for the victims of the Boston Marathon bombing by holding an American flag.
Craig Smith, Trisha Bunn and Keith Luxon, runners who previously ran in the Boston Marathon, shows their support for Boston in London Sunday.
American runner Jason Darnall of Kentucky, who previously ran the in Boston Marathon in 2012 but ran in London this year wears a black ribbon.
Another runner pinning his ribbon to his shirt.
A runner in the London Marathon puts her hand on over her heart as a tribute to the the Boston Marathon victims as she crosses the finish line.
Another image of runner Tricia Bun who previously ran in the Boston marathon, showing her support for the victims.
Welsh runner singer Katherine Jenkins holds her hand over her heart for Boston.
A powerful image of the runners during the moment of silence.