A Formula One race car is reflected in a fireman's helmet in Monaco. | (AP Photo/Claude Paris)

A vendor prepares fried dough near Aleppo, Syria. | (EPA-EFE/MOHAMMED BADRA)

Children cool off at a punctured water supply line in Karachi, Pakistan. | (EPA-EFE/SHAHZAIB AKBER)

A young owl is measured, weighed, and ringed at the zoo in Arnhem, The Netherlands. | (EPA-EFE/PIROSCHKA OF THE WOUW)

A visitor walks past a display at a flower show in London. | (AP Photo/Matt Dunham)

Members of the Presidential Guard perform in front of the Tomb of the Unknown Soldier in Athens. | (AP Photo/Thanassis Stavrakis)

Tightrope performers practice their instruments in Zhangjiajie, China. | (China Daily via REUTERS)

A man golfs as an ash plume rises from the Kiluaea volcano in Hawaii. | (AP Photo/Jae C. Hong)

A mask is burned during a workers' demonstration in Paris. | (AP Photo/Christophe Ena)

A rocket blasts off from Vandenberg Air Force Base in California. | (Bill Ingalls/NASA via AP)

A plow clears snow at Great St. Bernard pass, Switzerland. | (EPA-EFE/VALENTIN FLAURAUD)

A boat sails across a lake near Chevroux, Switzerland. | (EPA-EFE/ANTHONY ANEX)

**See last week's best photojournalism**