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By Reuters -

Emergency workers and Amtrak personnel inspect a derailed Amtrak train in Philadelphia, May 13, 2015. REUTERS/Lucas Jackson

The wreckage of a fishing boat that was used by immigrants to reach Europe is pictured at the southern Italian island of Lampedusa, May 13, 2015. REUTERS/Alessandro Bianchi

(L-R) Actress Catherine Deneuve, director Emmanuelle Bercot, actor Rod Paradot, cast members of the film "La tete haute" out of competition, attend the opening ceremony of the 68th Cannes Film Festival in Cannes, southern France, May 13, 2015. The 68th edition of the film festival will run from May 13 to May 24. REUTERS/Regis Duvignau

Framed pictures are seen hanging from the wall of a house damaged by earthquakes in Sindhupalchowk district, Nepal, May 13, 2015. REUTERS/Ahmad Masood

Director Emmanuelle Bercot reacts as she poses during a photocall for the film "La tete haute" out of competition before the opening of the 68th Cannes Film Festival in Cannes, southern France, May 13, 2015. REUTERS/Eric Gaillard

Migrants (top) walk as tourists (bottom) walk on the sea at the southern Italian island of Lampedusa, May 13, 2015. The European Union's executive proposed on Wednesday taking in 20,000 migrants over two years and distributing them across Europe, a plan Britain, one of its largest members, has already opted out of. REUTERS/Alessandro Bianchi

President Obama meets with Saudi Crown Prince Mohammed bin Nayef (C) in the Oval Office of the White House in Washington May 13, 2015. At left is Saudi Foreign Minister Adel Al Jubeir . REUTERS/Kevin Lamarque

Women walk past a building damaged by earthquakes, causing it to lean to a side, in Sindhupalchowk district, Nepal, May 13, 2015. REUTERS/Ahmad Masood

An Afghan immigrant carries his son, followed by his wife, as they walk through a field close to the Greek-Macedonian border in an attempt to flee to Macedonia from the border village of Idomeni in Kilkis prefecture May 13, 2015. Hundreds of mostly Afghan, Syrian, and African immigrants cross daily from Greece into Macedonia on their way to northern European countries; most of them are turned back by Macedonian border guards. REUTERS/Yannis Behrakis

Emergency workers look through the remains of a derailed Amtrak train in Philadelphia, May 13, 2015. REUTERS/Lucas Jackson

Former Florida Governor Jeb Bush takes questions at a town hall meeting in Reno, Nevada May 13, 2015. REUTERS/James Glover II

An arson investigator talks on a two-way radio inside a gutted slipper factory in Valenzuela, Metro Manila in the Philippines, May 14, 2015. A fire at a factory making rubber slippers killed 31 workers in the Philippine capital on Wednesday, and dozens were missing and feared dead, officials said. REUTERS/Erik De Castro

An oxen ploughs the land during an annual ploughing ceremony in central Bangkok, Thailand, May 13, 2015. The ancient ploughing ceremony in Buddhist Thailand, overseen by Thailand's Crown Prince Maha Vajiralongkorn, marks the end of the dry season and is meant to herald an auspicious start for the rice-planting season. REUTERS/Chaiwat Subprasom

Soldiers carry an earthquake victim towards the ambulance after being airlifted from Sindhupalchok District at Tribhuvan International Airport in Kathmandu May 13, 2015. REUTERS/Navesh Chitrakar

Britain's Prince Harry performs the haka with soldiers from the 1st New Zealand Brigade during his visit to Linton Military Camp near Palmerston North, May 13, 2015. Prince Harry is on a week-long tour of New Zealand. REUTERS/Anthony Phelps

Ambulances and people gather outside the hospital after an attack on a bus in Karachi, Pakistan, May 13, 2015. Gunmen on motorcycles opened fire on a bus in Pakistan's southern city of Karachi on Wednesday, killing at least 43 people, police said, in the latest attack directed against religious minorities this year. REUTERS/Akhtar Soomro