US bomb for underground targets resurfaces amidst Iran tensions.

The US Air Force briefly posted pictures of the GBU-57, a powerful bomb designed to destroy underground facilities that could be used to enrich uranium, before taking them down due to sensitive details about the weapon's composition and punch. The bomb was developed in the 2000s as concerns grew over Iran hardening its nuclear sites by building them underground. However, recent satellite imagery suggests that Iran is constructing a nuclear facility beyond the range of the GBU-57, which could pose a challenge for any potential US military strike.