John Brennan, the CIA director, told a Senate committee Tuesday that the violence and instability in the Middle East was the worst it had been in 50 years, painting a dire picture of a region he said was facing "unprecedented" bloodshed. Brennan spoke at the Senate Intelligence Committee's annual worldwide-threats hearing, emphasizing the threats the US faces as the Middle East devolves further into chaos. "The Middle East right now I think is racked by more instability and violence and inter-state conflict than we've seen certainly in the past 50 years," Brennan said. "And the amount of bloodshed and humanitarian...