Bunker-busting ordnance is kept at base home to B-2 stealth bombers, the only aircraft that can deploy the bomb; but depth of Natanz tunnels likely presents a serious challenge

Head of Iran's Islamic Revolutionary Guards Corps vows to drive US from Middle East, the latest in a series of threats following the assassination of the top general 3 years ago

US Navy's 5th Fleet, based in Bahrain, says is 'working with regional allies and partners to increase the rotation of ships and aircraft' that patrol key Strait of Hormuz

Marshall Islands-flagged, Turkey-managed ship had just come from Kuwait and was heading to Texas, Navy says, noting that Tehran's actions are 'contrary to international law'

Amid rising tensions between foes, descision blames former presidents Bush and Obama, CIA, Treasury and others for having 'central role' in directing terrorist attacks in country

Iranian navy says its own sub took action against US vessel in strategic Strait of Hormuz; 5th fleet calls statement 'more Iranian disinformation'

Niloufar Bahadorifar provided financial support to 'brazen plot' to abduct Iranian human rights activist living in US whom Tehran has sought to silence for years, US attorney says

Tehran's Beijing-sponsored pivot towards detente and strategic alliance with Sunni Muslim states presents significant new security challenges for Israel and the US

Tehran said planning drone hits after Revolutionary Guards members killed in strikes blamed on Israel; US announces it sent nuclear-powered submarine to region amid tensions

In rare move, Pentagon publishes picture of guided-missile submarine transiting the Suez Canal, says vessel will 'help ensure regional maritime security and stability'