Drone wars and state secrecy – how Barack Obama became a hardliner

He was once a liberal law professor who campaigned against the Iraq war. Now, according to revelations last week, the US president personally oversees a 'kill list' for drone strikes in Yemen and Pakistan. Then there's the CIA renditions, increased surveillance and a crackdown on whistleblowers. No wonder Washington insiders are likening him to 'George W Bush on steroids'