The muezzin's call to predawn prayers had not yet woken the seaside Somali town of Barawe when a lone figure stepped out of a two-story villa near the water's edge. In the darkness of a walled compound, he smoked a cigarette, the glow of ash rhythmically illuminating his face. It was an effect that was heightened by the night-vision goggles focused on him. When the man stepped back inside, the commander of Navy SEAL Team Six, his own face hidden under black grease, directed his commandos to take up their positions and storm the villa. The date was Oct. 5, 2013, and inside was a Kenyan named Abdikadir Mohamed Abdikadir, or Ikrimah—the leader of al-Shabaab suspected of masterminding the gruesome killing of non-Muslims at Nairobi's Westgate Mall.