chemical weapons incinerators

Jay Reeves / Associated Press

The Pentagon spent $10.2 billion over three decades burning chemical weapons stored in four states. Now, with those chemicals up in smoke and communities freed of a threat, the Army's in the middle of another, $1.3 billion project: Demolishing the incinerators that destroyed the toxic materials.

In Alabama, Oregon, Utah and Arkansas, crews are tearing apart multibillion-dollar incinerators or working to draw the curtain on a drama that began in the Cold War, when the United States and the former Soviet Union stockpiled millions of pounds of chemical weapons.