Photos of the day - April 21, 2013
Published: April 21, 2013 09:39PM
Updated: April 21, 2013 09:39PM
Two women applaud after the arrest of a suspect of the Boston Marathon bombings in Watertown, Mass., Friday, April 19, 2013. Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during their getaway attempt. (AP Photo/Charles Krupa)
A collection of some of the best photos of the day, from throughout the world.