Photos of the day - May 21, 2015

A volunteer with Massachusetts Military Heroes Fund, replaces damaged flags in the fund's flag garden on Boston Common in Boston; a protester prepares to throw a stone at a policeman during a protest against Burundi President Pierre Nkurunziza; and, shaven-headed children take a ride on a roller coaster during their visit to the Everland amusement park in Yongin, South Korea.

These are just a few of the photos of the day for May 21, 2015.

Find more news-related pictures in our photo galleries and follow us on Tumblr!