NNSA resumed work on a W78 warhead replacement, designated as the W87-1, in fiscal year (FY) 2019. The W87-1 is planned to be fielded on the .... While the two warhead replacement costs are similar, NNSA now argues reworking the W78 “would not meet military requirements and would .... The National Nuclear Security Administration is preparing to restart a program to replace the W78 nuclear warhead, and new facilities at the ....

warhead in 20 years. As a replacement designed to match the explosive-yield ... an eventual RRW2 would be the W78 warhead that sits atop land-based ....

Each Minuteman III ICBM is armed with one warhead: either a. 335-kiloton W78 or a 300-kt W87. The W78 warhead is carried in the.

Mk12A re ....