A look at the warships, jet fighters and missiles massing at Iran’s doorstep.

Dozens of fighter jets, including F-35s, F-22s, F-15s and F-16s, left bases in the U.S. and Europe and were spotted heading to the Middle East by the Military Air Tracking Alliance, a team of about 30 open-source analysts that routinely analyzes military and government flight activity.

A second American aircraft carrier moved closer to the Middle East Thursday, as President Trump remains noncommittal about whether he'll use force against Iran.

As the United States continues a significant military buildup in the Middle East, Iran has taken steps to signal its readiness for war, including fortifying its nuclear sites and rebuilding missile production facilities.

A second American aircraft carrier -- the USS Gerald R. Ford -- is heading toward the Middle East amid rising tensions with Iran, accompanied by destroyers and aircraft being redeployed from missions in the Caribbean region, a U.S. official told ABC News.

According to the Washington Post, flight-tracking data show that tanker planes, fighter jets, and other US military aircraft have been repositioned in recent days, including advanced F-35s.

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