As coordinated U.S. and Israeli strikes on Iran continue, current and former defense officials say that while a limited strike lasting several days is feasible, sustaining a broader confrontation — one involving potentially hundreds of incoming missiles — is far more complicated. The U.S. and Israel undertook a mission known as Operation Epic Fury, targeting Iranian leadership and military sites Saturday. Its duration is still unclear, but the...

After radical students overthrew Iran’s shah in 1979 and took hostages in the U.S. embassy, the Middle Eastern nation became a strident and blood-soaked adversary of what its new Islamic fundamentalist dictatorship has long called the “Great Satan.” Since then, Tehran has sponsored terrorism around the globe, including targeting the U.S. in multiple, high-profile instances. Former Reagan Justice Department chief of staff Mark Levin said Sunday there are...