This picture taken on July 15, 2014 shows a bridge submerged in floodwaters in the ancient town of Fenghuang, central China's Hunan province. Rainstorms lashed central China's Hunan Province and southwest China's Guizhou Province, affecting over 1 million people and flooding a historical town, state media reported. (Photo by AFP Photo)

A street lamp is seen in floodwaters in front of partially submerged buildings by an overflowing river at the ancient town as heavy rainfall hits Fenghuang county, Hunan province July 15, 2014. More than 50,000 locals and tourists were evacuated since Monday night as record downpours hit Fenghuang county of central China's Hunan province, Xinhua News Agency reported. (Photo by Reuters/China Daily)

Smoke rises after a shelling at Tripoli International Airport July 15, 2014. The airport sustained extensive damage after coming under shellfire which killed two soldiers, knocked out the control tower and damaged 90 percent of planes parked there. The airport area is under the control of former fighters from the western town of Zintan who have held it since the fall of Tripoli in 2011. Rival Islamist-leaning militias fought with the Zintanis in recent days but failed to dislodge them. (Photo by Hani Amara/Reuters)

A military honor guard prepares to welcome U.S. Chief of Naval Operations Admiral Jonathan Greenert at the PLA Navy headquarters outside of Beijing July 15, 2014. Greenert met with PLA Navy Commander in Chief Admiral Wu Shengli on Tuesday. (Photo by Stephen Shaver/Reuters)

Women try to avoid dust as a plane, carrying nutrition supplements brought in by Medecins Sans Frontieres (MSF), lands in Leer July 15, 2014. The MSF hospital was giving service to over 200,000 people before it was looted and burned during fighting in late January and early February. The Hospital currently attends 1400 malnourished children according to Medecins Sans Frontieres. (Photo by Andreea Campeanu/Reuters)

A local woman greets Ukrainian soldiers in central Slaviansk July 15, 2014. The city, which the government wrested control from pro-Russian separatists 10 days ago, suffers from a lack of electricity and water, local media reported. Ukraine has made fresh charges of Russian involvement in its conflict with separatist rebels, suggesting Moscow may have had a role in an air strike on Tuesday that killed 11 people. (Photo by Gleb Garanich/Reuters)

A paramilitary policeman walks among floodwater as he transports residents' belongings to safety amid heavy rainfalls in Tongren, Guizhou province July 15, 2014. Rainstorms lashed China's Hunan Province and Guizhou Province on Monday and Tuesday, affecting over 1 million people, Xinhua News Agency reported. (Photo by Reuters/Stringer)

A new volunteer of Ukrainian self-defence battalion “Azov” embraces his girlfriend after a ceremony where he took an oath of allegiance to the country, in Kiev July 16, 2014. The volunteer would shortly head to eastern Ukraine. (Photo by Valentyn Ogirenko/Reuters)

A new volunteer of Ukrainian self-defence battalion “Azov” embraces his girlfriend after a ceremony where he took an oath of allegiance to the country, in Kiev July 16, 2014. (Photo by Valentyn Ogirenko/Reuters)

Honda's latest version of the Asimo humanoid robot walks up stairs during a presentation in Zaventem near Brussels July 16, 2014. Honda introduced in Belgium an improved version of its Asimo humanoid robot that it says has enhanced intelligence and hand dexterity, and is able to run at a speed of some 9 kilometres per hour (5.6 miles per hour). (Photo by Francois Lenoir/Reuters)

Israeli police and members of the media take cover as a siren sounds, warning of incoming rockets, during a visit by Israel's foreign Minister Avigdor Lieberman and his Norwegian counterpart Borge Brende (both not pictured) to a site where a rocket landed, in Ashkelon July 16, 2014. Israeli shelling killed four boys on a Gaza beach on Wednesday, a local health official said, and Palestinian militants fired a further 70 rockets into Israel after a failed Egyptian attempt to halt more than a week of warfare. (Photo by Amir Cohen/Reuters)

A Palestinian woman (L) cries inside her damaged house, which police said was targeted in an Israeli air strike, in Gaza City July 17, 2014. Israeli shelling killed four Palestinian boys on a Gaza beach on Wednesday, an incident the military called tragic, and Israel and Hamas said they would cease attacks for five hours on Thursday for a humanitarian truce requested by the United Nations. Palestinian militants fired more than 130 rockets into Israel on the ninth day of a war in which Israeli attacks have killed 216 Palestinians, including six in two air strikes on Wednesday. Most of the casualties were civilians, health officials in Gaza said. In Israel, a civilian has been killed by one of more than 1,000 Palestinian rockets fired and more than half a dozen people have been wounded. (Photo by Mohammed Salem/Reuters)

Relatives tie Tingting to her bed during a bout of seizure at home in Linyi, Shandong province, July 15, 2014. Tingting, 12, has been having seizures for the past two years, and according to her single mother Ma Zimei, she needs to be tied to her bed most of the time to prevent her from attacking people particularly during convulsions. Despite paying visits to various doctors, no one has been able to come up with any diagnosis to explain her illness, local media reported. (Photo by Reuters/Stringer)

Smoke rises as “Free Syrian Army” fighters react after firing a weapon towards forces loyal to Syria's President Bashar al-Assad, in the southern part of Maarat Al-Nouman, Idlib July 16, 2014. (Photo by Rasem Ghareeb/Reuters)

A “Free Syrian Army” fighter runs while holding a weapon in Wadi Al-Dayf in the southern Idlib countryside July 16, 2014. (Photo by Khalil Ashawi/Reuters)

Residents lift a house damaged by Typhoon Rammasun (locally named Glenda) in a coastal village of sea gypsies, also known as Badjaos, in Batangas city, south of Manila, July 17, 2014. The Philippines set to work clearing debris, reconnecting power and rebuilding flattened houses on Thursday after the typhoon swept across the country killing 38 people, with at least eight missing, rescue officials said. (Photo by Erik De Castro/Reuters)

An Israeli soldier reads a newspaper as another one prepares to pray next to an armoured personnel carrier (APC) outside the southern Gaza Strip July 17, 2014. Palestinians rushed to shops and banks on Thursday as a five-hour humanitarian truce agreed by Israel and Hamas came into force, hours after the Israeli military said it had fought off gunmen who infiltrated from Gaza. About a dozen Palestinian fighters tunnelled under the border, emerging near an Israeli community. At least one was killed when Israeli aircraft bombed the group, the military said. (Photo by Ronen Zvulun/Reuters)

“The Ninth Wave”, an art piece by Chinese artist Cai Guoqiang, docks along the Huangpu River as part of the 2014 Power Station Art exhibition in Shanghai July 17, 2014. The artwork features a fishing boat from the artist's hometown of Fujian depicting 99 fake stuffed animals that have been sickened by the environment. (Photo by Carlos Barria/Reuters)

A man looks at an installation of keys, used in Stasi police barracks, by Sonya Schoenberger, that is installed inside Christoph Zwiener's exhibition project “ADN Guard House” in Berlin July 11, 2014. A German artist has turned a tiny surveillance booth used by the communist regime in the former East Germany to monitor citizens into an art exhibit and venue, which will be installed in a museum near Los Angeles dedicated to the Cold War. The one-person guardhouse measuring 2 m by 1 m (2 yards by 1 yard) was originally located in the parking lot of state-run news agency ADN so that authorities could keep a watchful eye on reporters. Artist Christof Zwiener rescued it from demolition. (Photo by Thomas Peter/Reuters)

A resident climbs on a bridge destroyed during the onslaught of Typhoon Rammasun, (locally named Glenda) in Batangas city south of Manila, July 17, 2014. The Philippines set to work clearing debris, reconnecting power and rebuilding flattened houses on Thursday after a typhoon swept across the country killing 38 people, with at least eight missing, rescue officials said. Typhoon Rammasun, the strongest storm to hit the Philippines this year, was heading towards China after cutting a path across the main island of Luzon, shutting down the capital and knocking down trees and power lines, causing widespread blackouts. (Photo by Erik De Castro/Reuters)

People buy fruits from a street hawker on a waterlogged road after heavy rain in the western Indian city of Ahmedabad July 18, 2014. The monsoon rains were 15 percent below average in the past week, against 41 percent below average rainfall in the previous week, the weather office data showed. On Thursday, the annual rains covered the entire country two days later than schedule. (Photo by Amit Dave/Reuters)

An Israeli tank performs a manoeuvre after the end of a five-hour humanitarian truce, near the border with the Gaza Strip July 17, 2014. Israeli leaders on Thursday played down prospects of a permanent Gaza ceasefire and fighting returned to a familiar pattern of Palestinian rocket salvoes and Israeli bombing after the five-hour humanitarian truce. (Photo by Ronen Zvulun/Reuters)

A tourist poses for photographs as he plays in the mud during the Boryeong Mud Festival at Daecheon beach in Boryeong July 18, 2014. About 2 to 3 million domestic and international tourists visit the beach during the annual mud festival, according to the festival organisers. (Photo by Kim Hong-Ji/Reuters)