The U.S. Department of Energy's National Nuclear Security Administration (NNSA) announced Thursday it had "successfully" modernized the first B61 nuclear gravity bomb to increase the nation's air-delivered nuclear deterrent capability amid threats of war with Russia in Ukraine and China in the South China Sea and or in the Taiwan Strait. Over the years, we've been documenting (read: here & here) NNSA's $12 billion program to modify aging B61 thermonuclear gravity bombs for the modern battlefield. The weapons first entered service in the late 1960s and needed upgrades to be more effective and increase lifespan by another two decades. The...