As evidence mounts that last week’s attacks in Mumbai may have originated on Pakistani soil, American officials’ aggressive campaign to strike at militants in Pakistan may complicate efforts to prevent an Indian military response, which could lead to a conflict between the bitter enemies.

In December 2001, when Pakistani militants attacked India’s Parliament, and again this summer, when militants aided by Pakistani spies bombed the Indian Embassy in Afghanistan, the Bush administration used aggressive diplomacy to dampen anger in New Delhi. Read in full