Here's how the world's largest non-nuclear bomb, the guided Massive Ordnance Penetrator, could go deep underground and shake up Iran's Fordow nuclear fuel-enrichment facility.

With tensions escalating between Israel and Iran, the focus has shifted to one of the most heavily guarded sites in the Islamic Republic: the Fordow nuclear facility, buried deep within a mountain.

Here’s how a nuclear bomb actually works. The B61 and the B83 nuclear bombs currently in the United States’ arsenal are thermonuclear, or hydrogen bombs, and quite different than the fission weapons ...