Conversation so far:
What does Baitullah Mehsud have to do with Benazir Bhutto's assassination?
On 28 December 2007 the Pakistan government claimed that it had strong evidence regarding Baitullah Mehsud as the man behind the assassination of former Prime Minister Benazir Bhutto.
How was Baitullah Mehsud involved in the assassination of Benazir Bhutto?
Why did Baitullah Mehsud kill Benazir Bhutto?
Are there any other interesting aspects about Baitullah Mehsud's and the assassination of Benazir Bhutto?
U.S. President George W. Bush placed Mr. Mehsud on a classified list of militant leaders whom the C.I.A. and American commandos were authorized to capture or kill.“
Who did Baitullah Mehsud work for?
...U.S. intelligence official, Michael V. Hayden said Bhutto was killed by fighters allied with Mehsud, a tribal leader in northwestern Pakistan, with support from al-Qaeda's terrorist network.“

Question: Why was he classified as a militant leader?
Self-contained rewrite: Why was Baitullah Mehsud classified as a militant leader?