A look at three possible successors to Pakistan Taliban leader Baitullah Mehsud, who is believed to have died in a U.S. missile strike Wednesday. ___ HAKIMULLAH MEHSUD, 28, aka Zulfiqar Mehsud. Commander of three tribal regions, Hakimullah has a reputation as the most ruthless of Mehsud's deputies. Although the youngest contender, he is considered the likeliest to take over.