The Week in Pictures: June 16 - 23

Cleveland Cavaliers' LeBron James stands in the back of a Rolls Royce as it makes its way through the crowd lining the parade route in downtown Cleveland, June 22, celebrating the basketball team's NBA championship.

PHOTOS: Cavaliers Celebrate NBA Championship With Massive Parade

People walk on the monumental installation entitled "The Floating Piers" created by artist Christo Vladimirov Javacheff on Iseo Lake, in northern Italy on June 18. Approximately 200,000 floating cubes were used to create an almost two-mile runway connecting the village of Sulzano to the small island of Monte Isola for a 16-day outdoor installation.

Nuns leave a polling station after voting in the European Union referendum in London on June 23.

Europe held its breath Thursday as the U.K. began voting in a national referendum on whether or not to quit the European Union, with the outcome predicted to be on a knife-edge after a months-long and bitterly divisive campaign.

PHOTOS: Brexit Vote Met With Cheers and Shock

Read More: Brexit Referendum

U.S. Customs and Border Patrol Officer Constantino Zarate tries to herd an Emu off the highway as a wildfire continues to burn north of the U.S. Mexico border near Potrero, California, June 21.

PHOTOS: Crews Battle Raging Wildfires

A photo tweeted from the floor of the U.S. House of Representatives by Rep. Donna Edwards shows Democrats, including herself and Rep. John Lewis, left, staging a sit-in on the House floor "to demand action on common sense gun legislation" on Capitol Hill on June 22.

PHOTOS: House Democrats Stage Overnight Sit-In

A woman checks the time for morning prayer during the holy month of Ramadan in the Old City of the northern Israeli city of Arce, June 20.

A truck which was carrying chickens burns after clashes between police and protesters from the National Coordination of Education Workers teachers' union in Nochixtlan, northwest of the state capital, Oaxaca City, Mexico on June 19. Eight people died in clashes. 

The teachers have demanded the release of some of their leaders who were recently arrested, but their complaints are long-running.

Among them is the government's use of a single exam that decides whether a teacher is qualified to work or not.

A water bomber makes a drop on a wildfire as it attacks the flames near Campo, California, June 20.

A relative of a Nepalese worker, who was killed in a Kabul suicide bombing, mourns as 12 bodies arrived at the international airport in Kathmandu, Nepal, June 22. A Nepal Airlines special chartered plane brought home all 12 security guards killed and the 24 injured in the attack on June 20. 

Chiquinho, a 12-year-old cat, takes a ride on his owner's motorcycle in Rio de Janeiro on June 19.

A Pakistani religion student takes a nap in a class during Ramadan in Peshawar, Pakistan, June 17. Muslims across the world are observing the holy fasting month of Ramadan, when they refrain from eating, drinking and smoking from dawn to dusk.

People look at tributes for Jo Cox, the 41-year-old British Member of Parliament shot to death in northern England, on Parliament Square in London, June 17. The mother of two young children was shot to death last week in her constituency near Leeds.

Democratic presidential candidate Hillary Clinton and former President Bill Clinton hold their second grandchild, Aidan Clinton Mezvinsky, born on June 18 to their daughter Chelsea Clinton and her husband Marc Mezvinsky.

Twin giant panda cubs are seen in Chengdu, Sichuan Province, China, June 21. According to local media, a giant panda named Ya Li gave birth to the twins on June 20, which are the first giant panda twins of 2016 anywhere in the world.

Powered by the sun, the Solar Impulse 2 aircraft flies over New York City on June 20 as Andre Borschberg embarked on the transatlantic leg of a record-breaking flight around the world to promote renewable energy.

PHOTOS: Solar Impulse Soars Across Atlantic In Historic Flight

Ernesto Vergne prays at a cross honoring his friend Xavier Emmanuel Serrano Rosado and the other victims at a memorial to those killed in the Pulse nightclub mass shooting a few blocks from the club, June 17 in Orlando, Florida.

PHOTOS: Vigils Across Country Remember Victims of Pulse Massacre

The Week in Pictures: June 9 - 16