Entombed in a mountainside south of Tehran: a enrichment plant vital to Iran’s nuclear ambitions, and Israel’s attempts to dismantle them.

Israel’s decision to attack Iran’s nuclear program on June 12 might go down in history as the start of a significant regional war, and the inflection point that led Iran to finally acquire nuclear weapons.

Strikes on Natanz, Fordow, Isfahan and elsewhere pose little regional radiation risk but could release plumes of toxic chemicals, experts say.