Taking off from the U.S. heartland, B-2 stealth bombers, aided by refueling tankers and fighter jets, delivered a total of 420,000 pounds of explosives.

The GBU-57 A/B, weighing roughly 30,000 pounds, is a precision-guided bomb capable of penetrating about 200 feet below the surface before exploding.

The strikes happened Saturday amid Tehran’s threat of reprisals that could spark a wider regional conflict.

The aircraft carrier is deploying as part of a regularly scheduled deployment, a defense official said.

This year’s BALTOPS exercise included anti-submarine warfare, countermine operations and integration with an array of robotic and autonomous systems.