Haqqani Network

Pakistan's nukes

The attack by Taliban fighters this week on a major Pakistani air base where nuclear weapons allegedly were stored offered a dramatic example of what the U.S. fears most about its unstable, nuclear-armed ally. Though Pakistan claimed its forces repelled the attackers and denied that nuclear weapons were even present on the site, the incident inevitably revived long-standing U.S. concerns that terrorists could get their hands on a weapon of mass destruction.

The attack on the Minhas air force base and aeronautical college in Kamra, 37 miles north of Islamabad, was carried out early Thursday morning by gunman armed with automatic weapons and rocket-propelled grenades. Some of the...