US testing upgraded nuke bomb

Published April 16, 2017 2:31am ET



ALBUQUERQUE, N.M. — Scientists at Sandia National Laboratories are claiming success with the first in a new series of test flights involving an upgraded version of a nuclear bomb that has been part of the U.S. arsenal for decades.

Work on the B61-12 has been ongoing for years, and government officials say the latest tests using mock versions of the bomb will be vital to the refurbishing effort.

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