Iran’s Islamic Revolutionary Guard Corps (IRGC) has publicly showcased a large underground missile base near the Persian Gulf coast in a show of force while tensions with Washington reach new heights.

A video broadcast by Iran’s state media on Friday showed the head of the IRGC, Major General Hossein Salami, touring a large underground tunnel lined with missiles and missile launchers.

“What you see today is one of several IRGC Naval strategic missile facilities,” Salami was quoted as saying by the MEHR news agency. “Behind us, you can see a column of these missiles and their launch systems. These columns stretch for kilometers,” Salami added.

“These missiles have ranges of hundreds of kilometers, enjoy pinpoint accuracy and huge destructive power, and can overcome the enemy’s electronic warfare equipment,” Salami said. He added that in the past year, the Iranians had built underground “missile cities” along the Gulf coastline, warning of a “nightmare for Iran’s enemies.”

The Gulf has been a hotspot for years between the Iranians, the United States, Saudi Arabia, and other Gulf Arab countries that border the Islamic Republic. Iran has frequently used its fast attack boats to harass U.S. Navy ships that are traversing the Gulf. 

Just a few hours before the Iranians unveiled their base, the U.S. sent another pair of nuclear-capable B-52 strategic bombers to overfly the Middle East. This was the fourth time the planes have conducted a flyover since December.

On Monday, it seized a Korean tanker in the Gulf and it recently also conducted its first-ever drone exercise showcasing locally produced unmanned aircraft. 

Acting Secretary of Defense Chris Miller also reversed an earlier de-escalatory decision for the Nimitz Strike Carrier Group to return to its home base in Washington. Now the Nimitz group is streaming back to the Middle East.