Today in Pictures: July 26

Belgian scientists Marjolein Vanoppen and Sebastiaan Derese demonstrate the use of a machine that turns urine into fertilizer and drinkable water using solar energy at the University of Ghent in Belgium.   

A woman confesses her sins to a priest as Catholics attend the "Grand Pardon" religious procession in Sainte-Anne-d'Auray in western France. This Catholic pilgrimage, which has existed since 1625, is the most important in Brittany. 

Boys race down a slope using makeshift carts known as "chivichanas" in downtown Havana. Cuba marks the anniversary of the July 26, 1953, rebel attack led by Fidel and Raul Castro on the Moncada military barracks. The attack is considered the beginning of the revolution that culminated with dictator Fulgencio Batista's ouster. 

Israeli border police stand guard as Israeli machinery demolishes Palestinian houses in the West Bank village of Qalandia near Ramallah. 

A Palestinian girl photographs the rubble of a house, which was demolished by Israeli army bulldozers, in the village of Qalandia, next to Israel's controversial separation barrier between East Jerusalem and the Israeli-occupied West Bank town of Ramallah. 

Indian schoolchildren hold masks bearing the image of former President A.P.J. Kalam ahead of the first anniversary of his death during a remembrance event at a school in Chennai. Kalam, who played a leading role in the country's nuclear weapons tests, died on July 27, 2015. 

Veterans of Foreign Wars members listen as Republican presidential candidate Donald Trump speaks during a convention in Charlotte, N.C. 

Supporters of Sen. Bernie Sanders, I-Vt., yell at delegates through the fence at Franklin Delano Roosevelt Park in Philadelphia during the second day of the Democratic National Convention.

Students play on a log as dense clouds hover over the Victoria Memorial before heavy rain hit the city and disrupted daily life in Calcutta in eastern India. The Indian monsoon season usually takes place from May to September. 

A sun halo is seen in the sky over the pagoda of Wat Bowonniwet temple in Bangkok, Thailand. The halo is created by tiny ice crystals in cirrus clouds in the upper atmosphere.

A man looks up as he uses his phone to play the Pokemon Go app in Hong Kong. The Chinese army garrisoned in Hong Kong has warned people searching for Pikachu and other virtual monsters to stay off its premises as Pokemon Go mania sweeps the smartphone-obsessed city.