A ragtag band of US mercenaries, Ukrainian National Guard soldiers, and fighters from the radical Right Sector movement have arrived in the eastern Ukrainian city of Donetsk to raid a building occupied by anti-government protestors, a leader of a local militia group told RIA Novosti on Thursday. “About a hundred people from the National Guard are housed at the Donetsk airport,” said Sergey Tsyplakov, the deputy director of a local group called the People’s Militia of the Donbas. “Around a hundred Right Sector thugs are also in the city, as well as a hundred employees from a private US military...