How weapons fail 

Reports:

JASON report JSR-97-320: Signatures of Aging
JASON report JSR-97-320 (Signatures of Aging) "reviews what is known about the aging of critical constituents, particularly the high explosives, polymers, and metals in the enduring stockpile. "
January 1998

JASON report JSR-98-320: Signatures of Aging Revisited
JASON report JSR-98-320 (Signatures of Aging Revisited) is a follow-up to JSR-97-320 and reviews the "priorities on a number of essential near-term needs of maintaining weapons in the stockpile."
March 1998