DUBAI, United Arab Emirates -- The Strait of Hormuz, the narrow mouth of the Persian Gulf, again has become a focus of tensions as Iran prepares to launch a military drill that could see fire into a lane crucial for global shipping.

Several “downed Israeli drones” were among the military hardware on show during Iran ’s anniversary celebrations for the Islamic Revolution on Wednesday, according to state media in Iran.

President Trump threatened to strike Iran, but the military has needed time to build up its forces in the region.

U.S. Central Command warned Iran it will not tolerate "any unsafe and unprofessional behavior" near American forces ahead of live-fire naval drills.

With one American carrier strike group already in the Middle East and another apparently on its way as U.S. President Donald Trump ramps up pressure on Iran to give up its nuclear program, fears are rising of the outbreak of another war that could spread into a regional conflict.

Iran's Deputy Foreign Minister Majid Takht-Ravanchi hit back at the US for building military might in the Middle East, saying that not only Iran, but “everybody will suffer” if there is any aggression.