Rapid U.S. action to support Pakistan's relief efforts may help improve America's image among a population that generally resents the United States. Washington's $55 million aid pledge makes it the largest donor among the international community.

Unless we act decisively, large parts of flood-stricken Pakistan will be taken over by the Taliban, writes Ahmed Rashid...Pakistan's floods have not just devastated the lives of millions of people, they now present an unparalleled national security challenge for the country, the region and the international community.