Today in Pictures: April 21

A man rides his bicycle in a colza field near Dresden, eastern Germany, on April 21, 2016.

Britain's Queen Elizabeth II meets well wishers during a walkabout close to Windsor Castle in Berkshire as she celebrates her 90th birthday.

Gallery: Britons Prep for Queen's 90th Birthday Bash

Terrance May, a musician who goes by the name May Millions, takes a moment at a growing memorial outside First Avenue, a Minneapolis club where Prince filmed a large portion of his classic movie "Purple Rain" and recorded several songs on the accompanying album in Minneapolis. Prince one of the most inventive and influential musicians of modern times with hits including "Little Red Corvette," ''Let's Go Crazy" and "When Doves Cry," was found dead at his home on Thursday in suburban Minneapolis. He was 57.

Gallery - When Doves Cry: Prince's Career in Photos

Knoxville, a trained service dog, sleeps at the feet of retired U.S. Army soldier Stefan LeRoy, who was injured in Afghanistan in 2012, during a U.S. House Military Veterans Caucus briefing on legislation promoting service dogs for military veterans on Capitol Hill in Washington.

Canadian Prime Minister Justin Trudeau dodges a punch as he spars in the ring at Gleason's Boxing Gym in the Brooklyn borough of New York.

Ultra-Orthodox Jewish men gather to collect water from a spring to make matza, a traditional handmade Passover unleavened bread, near Jerusalem. Jews are forbidden to eat leavened foodstuffs during the Passover holiday. Passover celebrates the biblical story of the Israelites' escape from slavery and exodus from Egypt.

A police officer tapes off the area around two people who were killed when a bike lane collapsed in Rio de Janeiro, Brazil. Part of an elevated bike lane built ahead of the Olympic Games collapsed on Thursday, killing at least two people who were on it when cement gave way and crashed onto the beach below.

Greek actress Katerina Lehou, playing the role of High Priestess, carries the Olympic flame past youths during the Olympic flame lighting ceremony for the Rio 2016 Olympic Games inside the ancient Olympic Stadium on the site of ancient Olympia, Greece.

Indian Christian nuns from the Catholic Order of the Missionaries of Charity queue as they wait to cast their votes for state assembly elections inside a polling station in Kolkata. State assembly elections in West Bengal are taking place in five phases from April 4 to May 5.

A woman crosses a street at a busy intersection in central Beijing. China is increasingly becoming a nation of town and city dwellers, with more than 55 percent now living in urban areas, the government said Thursday.

The Week in Pictures: April 14 - 21