Two baby Sumatran tiger cubs dose in their enclosure at the zoo in the central German city of Frankfurt on May 25, 2011.

In this Sunday, May 29, 2011 photo, Aaron Fotheringham summersaults while flying through the air in his wheel chair, during practice for a Nitro Circus performance, in Pala, Calif. Fotheringham, who was born with spinal bifida, rides his chair on the "giganta ramp" during performances.

Solar panels of the Ain Beni Mathar power station are seen on May 31, 2011. The plant has a large array of 224 parabolic mirror collectors that concentrate solar energy. Two other plants with similar designs will soon be commissioned in Egypt and Algeria.

A Moroccan engineer cycles past the solar panels on May 31.

A merry-go-round turns inside the cooling tower of the former nuclear power plant in Kalkar, western Germany, on May 28. The plant was constructed from 1977 to 1986. Now it has been converted to a leisure park and receives some 600,000 visitors a year.

Visitors sit in a merry-go-round turning on the compound of the former nuclear power plant in Kalkar, western Germany, near the border with the Netherlands, on May 28. The plant was constructed from 1977 to 1986, but was never operating as nuclear power plant. Today, the plant, built at a cost of some 7 billion Deutsche Mark, was converted to a leisure fun park "Wunderland Kalkar" and receives some 600,000 visitors a year and employs about 550 people on the high season

Forest Service aircraft line up to drop fire retardant to create a fire break and stop an advancing wildfire before it roared into the West Cliff neighborhood of Amarillo, Texas on May 29.

A Lake Tanglewood fire unit attempts to contain a wildfire near Tangle Aire in Amarillo, Texas on May 29. Two wildfires have destroyed at least 12 homes on the outskirts of the Panhandle city, Texas Forest Service officials said.

Amarillo Police officers navigate heavy smoke while making door-to-door evacuations in the West Cliff neighborhood of Amarillo, Texas on May 29.

Bystanders look on as a crane lifts the wreckage of a bus which crashed in the village of Charabari, Kamrup District, some 60 km from Guwahati, Assam on May 31. Dozens of members of a wedding party were killed in India's northeastern state of Assam when their bus plunged into a gorge after hitting a wooden bridge, police said. Among the dead were the groom and his relatives, who were travelling to the bride's house to attend wedding rituals. Local people rushed to the scene and tried to save passengers trapped inside the vehicle, TV channels reported.

Backdropped by a night time view of the Earth and the starry sky, the Space Shuttle Endeavour is seen docked to the International Space Station in this photo provided by NASA and taken on May 28, 2011. Picture taken on May 28, 2011.

A customs official stands guard beside a preserved hawksbill turtle, locally known as "Pawikan," and rare black corals before customs officials and a senator present to media inside a customs headquarters in Manila May 30, 2011. According to customs officials, the Bureau of Customs seized earlier this month two containers of protected species amounting to 35 million pesos ($808,221) including 161 preserved hawksbill and green turtles, nearly 21,000 pieces of black corals, more than 7,300 seashells and 196kg of sea whips.

Filipinos bring out dried sea turtles from an illegal shipment seized by authorities and kept for inspection at the Bureau of Customs port in Manila, Philippines, 30 May 2011. The World Wild Fund for Nature (WWF) said marine species illegally captured by poachers end up as delicacies in Chinese restaurants and as medicines behind the drug counters of Hongkong, China, Philippines, Taiwan, Indonesia, Singapore, Malaysia, Thailand, Vietnam and Burma. The WWF has also called for intensified protection of coral reefs, following discovery of illegal shipments of black sea corals by Philippine authorities in May 2011.

Rice and crab farmer Pi Xiaozhen (front) ,wearing a traditional cone-shaped Chinese farming hat, watches as her husband Yong Houying carries water to irrigate their cotton crop, grown due to their failing rice crop, near the village of Wanghu in central China's Hubei Province May 30, 2011. Almost 35 million people across five provinces on the middle and lower reaches of the Yangtze have been affected to different degrees by the drought, the Chinese Ministry of Civil Affairs said last week. That number includes 4.2 million who have difficulty getting drinkable water. Direct economic losses are nearing 15 billion yuan ($2.3 billion), it said. Farmers said they would need generous rainfall in coming weeks, or the first of their two annual rice crops could wither and die, and more of the thousands of fish and crab farms could lose all their stock.

A view of the water level indicators of the Three Gorges Dam reservoir where the water level has dropped to below 151m where before it was as high as 173m in Sandouping town of Yichang, Hubei Province, central China, 30 May 2011. China is hurriedly increasing water discharges from the Three Gorges Dam, the world's largest hydro power complex, to relief its drought-plagued central and eastern provinces as a severe drought continues, the Office of the State Flood Control and Drought Relief Headquarters said 28 May 2011. China is suffering one of the worst drought in 50 years in provinces along the Yangtze River affecting more than 34 million people in provinces along the middle and lower reaches of the Yangtze River. The Three Gorges Dam has unleashed more than 2.76 billion cubic meters of water since May, reducing the reservoir's water level from 175 meters to 150.9 meters as of 28 May according to the Dam.

Workers on river-boats fill bags of gravel after removing it from the banks of the near-empty Neijing River, near the city of Honghu in central China's Hubei Province May 30, 2011.

A farmer and his wife dig a well in a paddy field near the town of Pao Ma village, which translates to "Running Horse", in central China's Hubei Province May 30, 2011.