American-fired missiles killed 20 Islamist militants in northwest Pakistan today, most of them members of a powerful insurgent network fighting the US presence in Afghanistan, say Pakistani intelligence officials. Two missiles slammed into a house in North Waziristan, a militant hotspot that lies just across the border from Afghanistan. Unnamed officials say 14 of the dead were Afghan militants belonging to the Haqqani network, a Taliban-linked militant faction fighting the US in Afghanistan. Six were Pakistani militants supporting the group, which America regards as one of its deadliest foes in Afghanistan. (More Afghanistan stories.)