Trying to bring WikiLeaks editor in chief Julian Assange to justice in the U.S. may be difficult. Assange is rumored to be in London but the Australian citizen has proved adept at moving between countries. Even a country with which the U.S. has warmer relations and an extradition treaty might argue that the prosecution is political, not criminal, and refuse to hand him over. Because of this, "getting him to the U.S., even from a friendly nation, isn't necessarily going to be easy," says Peter Spiro, an international law expert and professor at Temple's Beasley School of Law.