A baby walrus is watched over by her mother Dyna at the Hagenbeck Zoo in Hamburg. The nameless calf was born June 15ReutersChildren in gowns and mortarboards pose for pictures during their kindergarten graduation ceremony, in Wenxian county, Henan province, ChinaReutersArtist Jade Little touches up body paint on model Renee Somerfield, as she poses for a new advertisement by People for the Ethical Treatment of Animals (PETA) in SydneyReutersA circus worker performs as part of a protest against a law prohibiting the use of animals in circuses, in Mexico CityReutersEugenie Bouchard of Canada serves during her women's singles quarter-final tennis match against Angelique Kerber of Germany at the Wimbledon Tennis ChampionshipsReutersA participant of the "Zombie Takeover of Coney Island" poses for a portrait in Coney Island in the Brooklyn borough of New YorkReutersA seller of brooms and other cleaning supplies drives a motorised cart along a road in Villa El Salvador, on the outskirts of Lima, PeruReutersIndian Hindu priests from the Chilkur Balaji Temple stand in the Osman Sagar Lake in Hyderabad and offer prayers for monsoon rainsAFPA bolt of lightning strikes One World Trade Center in Manhattan as the sun sets behind the city after a summer stormReutersTropical Storm Arthur travels up the east coast of the United States, as seen behind the robotic arm of the International Space Station. The tropical storm is expected to strike the North Carolina Outer Banks over the Fourth of July holidayNasa/GettyA flare is seen following an Israeli airstrike over Gaza City. Israeli warplanes launched dozens of airstrikes on different targets in the Gaza Strip, including sites belonging to HamasAFPSuha, mother of Mohammed Abu Khudair, shows a picture of her son on her mobile phone at their home in Shuafat, an Arab suburb of Jerusalem. The body of the 16-year-old Palestinian youth was found in Jerusalem on Wednesday, raising suspicions he had been killed by Israelis avenging the deaths of three abducted Jewish teensReutersHealth workers carry the body of an Ebola virus victim in Kenema, Sierra Leone. The Ebola outbreak has killed 467 people in Guinea, Liberia and Sierra Leone since FebruaryReuters