Smallpox was wiped off the face of the Earth more than 30 years ago, but an outbreak on the Navajo reservation in New Mexico has claimed one life, and the disease is spreading. The conclusion that the outbreak is the result of a terrorist attack is official U.S. policy, but the facts don't add up to terrorism. Tipped off by a former classmate teaching in Farmington, Sarah Lockford, a Washington Post reporter, teams up with Jake Overman, a medical researcher from the Centers for Disease Control, to investigate the outbreak. As the National Security Council debates, the White House readies...