تصویر روز

A bystander throws a tear gas canister back at the al-Azhar University campus. The canister was originally shot by the Egyptian security forces towards protesters at the school in Cairo.

The fifth brightest galaxy in the sky Centaurus A, is shown in this handout photo provided by NASA May 1, 2014. Centaurus A is an active galaxy about 12 million light years from Earth and is part of a "quartet of galaxies" collaboration of professional and amateur astronomers that combines optical data from amateur telescopes with data from the archives of NASA missions.

A soldier and a paramilitary officer help to move part of a damaged car at the scene of a car bomb attack in Nyanya, Abuja, Nigeria.

Civilians find cover from the rain under a Ukrainian army armored personnel carrier at a checkpoint near the town of Slaviansk.

A protester reacts to being hit by pepper spray and then treated with a milky liquid during an anti-capitalist demonstration in Seattle, Washington, May 1, 2014.

Relative of an employee runs between the bleachers before workers play in a soccer match to commemorate Labour Day at the Arena Sao Paulo Stadium in Brazil, May 1, 2014.

Worshippers attend the Day of the Spiritual Indoctrinator annual celebrations at the Vale do Amanhecer (Valley of the Dawn) community in the Planaltina neighborhood of Brasilia, May 1, 2014.

Justin Rose of England chips in for eagle on the 15th during the second round of the Wells Fargo Championship at the Quail Hollow Club in Charlotte, North Carolina.

Injured children cry after, according to activists, two barrel bombs were thrown by forces loyal to Syria's president Bashar al-Assad in Hullok neighbourhood of Aleppo, May 1, 2014.

Tourists take a 'selfie' picture as demonstrators burn a trash container during a May Day rally in Barcelona, Spain, May 1, 2014.

People look at a fireworks display after the closing campaign rally of Presidential candidate for the ruling Democratic Party, Jose Domingo Arias, in Panama City, Panama, May 1, 2014.

Groundskeepers remove a tarp from the field during a rain delay between the first and second baseball games of a doubleheader between the Baltimore Orioles and the Pittsburgh Pirates, Thursday, May 1, 2014, in Maryland.

Horses get baths after morning workouts at Churchill Downs in Louisville, Ky.

A natural stream in the Chibika moutains in the Djerid region of south west Tunisia, west of the governorate of Tozeur.

Palestinian Muslim worshipers walk in Jerusalem's Al-Aqsa mosque compound following Friday prayers in Jerusalem's Old City, Israel.

Rescue workers attempt to remove sludge to rescue a group of miners in a gold mine that collapsed in San Antonio, in the rural area of Santander de Quilichao, department of Cauca, Colombia where independent mine workers were excavating the mine without authorization.

A lion is given a shower to cool down as temperatures rose at a zoological park in the Indian city of Jamshedpur.