26 Of The Most Powerful Photos Of This Week

A participant of the traditional dirty pig festival wearing a Homer Simpson mask wallows in a slough near Hergisdorf, Germany, on May 25, 2015. Peter Endig / AFP / Getty Images

A 2-month-old black howler monkey named Gael is nursed in the Rescue Center at the National Zoo of Managua, Nicaragua. The monkey was rescued by hunters before being brought to the center. Esteban Felix / AP

Visitors marvel at the main chamber of Gaping Gill, the largest underground cavern in Britain naturally open to the surface, near Ingleton, northern England. At a depth of almost 100 meters from the surface, and with a volume comparable to the nave of York Minster, trips into Gaping Gill cavern are offered twice a year to members of the public. Oli Scarff / AFP / Getty Images

A jockey spurs the cows during Pacu Jawi in Padang, Indonesia. The traditional cow race is held annually in muddy rice fields to celebrate the end of the harvest season by the Minangkabau people. Jockeys grab the tails of the bulls and skate across the mud barefoot balancing on a wooden plank to show the strength of their bulls, which are later auctioned to buyers. Robertus Pudyanto / Getty Images

Balloons featuring prominent world leaders are launched during a Group of Seven (G-7) protest by the international campaigning and advocacy organization “One” in front of Dresden, Germany’s Church of Our Lady. Robert Michael / AFP / Getty Images

Queen Elizabeth II is accompanied by Prince Philip, Duke of Edinburgh, in the Royal Gallery before the State Opening of Parliament in the House of Lords, at the Palace of Westminster in London. Suzanne Plunkett / WPA Pool / Getty Images

An exhibitor leads her cow in the judging ring on the opening day of the Royal Bath and West Show in Somerset, England. First held in 1852, it is one of the oldest surviving agricultural shows in England and features livestock, agricultural machinery, trade stands, and locally produced food and drink. Matt Cardy / Getty Images

People take photos as workers remove the marquee from the Ed Sullivan Theater where the “Late Show With David Letterman” used to tape in New York City. Carlo Allegri / Reuters

Legoland employee Pete Goodchild puts finishing touches on a giant mosaic of Taylor Swift is revealed at The Legoland Windsor Resort on May 25, 2015, in Windsor, England. Mikael Buck / Legoland via Getty Images

Mans Zelmerlow of Sweden reacts after winning the Eurovision Song Contest 2015 in Vienna. Nigel Treblin / Getty Images

Speller Vanya Shivashankar of Olathe, Kansas, and speller Gokul Venkatachalam of St. Louis, Missouri, hold up a single trophy after winning the Scripps National Spelling Bee on May 28, 2015, in National Harbor, Maryland. Shivashankar and Venkatachalam were declared co-champions in a tie at the annual spelling competition. Alex Wong / Getty Images

Dwight Howard of the Houston Rockets and Draymond Green of the Golden State Warriors go after the ball during game five of the Western Conference Finals of the 2015 NBA Playoffs at Oracle Arena on May 27, 2015, in Oakland, California. Thearon W. Henderson / Getty Images

Classmates celebrate after receiving their degrees from the John F. Kennedy School of Government during the 364th Commencement Exercises at Harvard University in Cambridge, Massachusetts. Brian Snyder / Reuters

Nursing students in a vocational school take part in a graduation examination outside of the classroom in Baoji in China’s Shaanxi province. Chinafotopress / Getty Images

Melinda Ellisor looks for clothing to give to a family of flood victims at Wimberley High School in Wimberley, Texas. Faculty and volunteers gathered at the school to organize flood relief supplies. Central Texas has been hit with severe weather, including catastrophic flooding and tornadoes, over the past several days. Drew Anthony Smith / Getty Images

Houseboats are moored on a shrinking arm of the Oroville Lake reservoir which is now at 25 percent capacity as a severe drought continues to affect California. Local media is reporting that California officials are now looking to Australia for advice on how to deal with long term drought as the state enters its fourth year of severe drought. Mark Ralston / AFP / Getty Images

An Indian police officer uses a baton to disperse a protester during a demonstration in Srinagar. Indian police on Thursday detained dozens of protesting government employees in Srinagar as they attempted to reach the civil secretariat, which houses the office of Kashmir’s chief minister and his colleagues, to demand their long pending arrears and a regularisation of temporary jobs. Danish Ismail / Reuters

A flower placed by a relative in the hand of a victim of an attempted car theft, who was shot dead during the struggle, in Guatemala City. Local media reported that during the struggle, the father of the victim came out of their house nearby to defend his son with a gun and in the ensuing shoot out, the victim and three out of four of the suspected thieves died and one fled. Jorge Lopez / Reuters

Police officers catch fire after being hit by a Molotov cocktail during a protest to mark the eight-month anniversary of the Ayotzinapa students’ disappearance in Mexico City. The students’ disappearance on the night of Sept. 26, 2014, in the southwestern city of Iguala triggered massive protests in Mexico and calls for justice. Officials say they were abducted by corrupt police officers, who handed them over to a local drug gang. Reuters Photographer / Reuters

A protester sets up a barricade during a protest against Burundi’s President Pierre Nkurunziza and his bid for a third term in Bujumbura, Burundi. Goran Tomasevic / Reuters

People enjoy sprinkling themselves with coloured powder during an annual Festival of Colours in Moscow. Dmitry Serebryakov / AFP / Getty Images

A couple embraces outside the count centre in Dublin as Ireland holds a referendum on gay marriage. Ireland voted heavily in favor of allowing same-sex marriage in a historic referendum that marks a dramatic social shift in the traditionally Catholic country. Cathal Mcnaughton / Reuters

Bayern Munich’s David Alaba pours beer over coach Pep Guardiola after their final German first division Bundesliga soccer match of the season against FSV Mainz 05 in Munich. Michael Dalder / Reuters

A man has his head tattooed during the Great British Tattoo Show in Alexandra Palace in north London. Neil Hall / Reuters

Christian Jacobs, 4, of Hertford, NC, lies on the grave of his father, Christopher James Jacob, during Memorial Day at Arlington National Cemetery in Arlington, Virginia. Joshua Roberts / Reuters

The U.S. Navy Blue Angels perform a fly-over to begin the graduation and commencement ceremony for the U.S. Naval Academy Class of 2015 in Annapolis, Maryland. Kevin Lamarque / Reuters