Today in Pictures: May 29

Participants run through Elevado do Joa during the Rio de Janeiro Marathon in Brazil on May 29, 2016.

Staff Sgt. Tim Chambers kisses his bride Lorraine Heist during the Rolling Thunder parade, the annual ride around Washington Mall to raise awareness for prisoners of war and soldiers still missing in action. Chambers has become a fixture of the parade, earning the name "The Lone Marine," as he stands each year at attention to salute the passing bikers. No longer "lone," Chambers was married in a ceremony just before the start of the parade.

PHOTOS: Rolling Thunder Motorcycle Ride Rumbles Through DC

10-year-old triplets, from left, Josef, Katerina And Daniel, hug each other during a meeting of twins and multiples in Zvole, Czech Republic.

Demonstrators shout slogans at police during a protest near an old bank branch where squatters had been living since 2011 in the Gracia neighborhood of Barcelona, Spain. Police clashed with some 200 demonstrators who protested the evictions of the squatters last week. 

A body is lifted off the Italian Navy vessel Vega at the Reggio Calabria harbor in southern Italy. More than 700 migrants trying to reach Europe are feared to have died in three Mediterranean Sea shipwrecks south of Italy over the past few days, the UN refugee agency said.

Frances Jockwig of Gladwin, Michigan, cries as she visits her husband's grave the morning before a Memorial Day ceremony honoring deceased veterans at Great Lakes National Cemetery in Holly, Mich.

PHOTOS: Memorial Day Tributes Honor Fallen Service Members

A child touches the head of a gorilla statue where flowers have been placed outside the Gorilla World exhibit at the Cincinnati Zoo & Botanical Garden in Cincinnati. On Saturday, a special zoo response team shot and killed Harambe, a 17-year-old gorilla, after a 4-year-old boy who fell into the gorilla exhibit moat.

A visitor who recorded the harrowing moments after the child fell into the exhibit said Sunday that the hulking ape appeared to be more of a gentle giant -- protecting the child before the animal was shot dead.

A migrant is shaved, near a camp in Polykastro, Greece, after many migrants moved from the nearby camp in Idomeni, which was cleared by Greek authorities. 

A member of the Iraqi security forces fires artillery during clashes with ISIS militants near Fallujah, Iraq.

Serbia's Viktor Troicki returns in the fourth round match of the French Open tennis tournament against Switzerland's Stan Wawrinka at the Roland Garros stadium in Paris. 

A boat sails behind a woman looking through binoculars as she sits on a cliff on a sunny day in Sydney, Australia.

Saturday in Pictures: May 28