The Russian team performs during the 32nd rhythmic gymnastics world championships, in Kyiv, Ukraine.
Paramilitary policemen dance with fans during a massive performance to mark the opening ceremony of the 12th Chinese National Games at the Olympic Sports Center in Shenyang, Liaoning province.
Federal police surround the Congress building in Mexico City, Mexico. According to local media, government authorities sealed off Congress within the framework of opening a new year of legislative session as well as the sending of the first government annual report by President Pena Nieto on Sep. 1.
Late summer plankton blooms across much of Lake Ontario, one of North America's Great Lakes, in this photograph taken by an astronaut on the International Space Station. Microscopic cyanobacteria, or blue-green algae, can reach such large concentrations and color the water to such an extent that the change is visible from orbit. (Courtesy of NASA)