It all depends on who you ask.
Al-Qaeda represents the most serious threat to US interests, the new US intelligence chief has said.
Sounds pretty serious, but don’t worry too much a slightly more intelligent man disagrees.
Stephen W. Hawking, the renowned cosmologist and mathematician, told The Associated Press that global warming has eclipsed other threats to the planet, such as terrorism.
“Terror only kills hundreds or thousands of people,” Hawking said. “Global warming could kill millions. We should have a war on global warming rather than the war on terror.”