Iran launched a missile and drone strike on Prince Sultan Air Base in Saudi Arabia on March 27, wounding at least 12 American troops and heavily damaging at least two KC-135 aerial refueling planes.

Iran fires on average 20 to 30 ballistic missiles per day and continues to launch scores of drones each day. Since February 28, Iran has launched about several dozen short- and long-range missiles per day on average, with the missile hit rate increasing over this period.

On the opening day of the war, Iran fired hundreds of ballistic missiles in massive salvos aimed at overwhelming U.S. and Israeli air defenses. Most of the ballistic missiles fired on the opening day were intercepted. Since the beginning of the war, Iran's missile launches have dropped by 90 percent.

"US and Israeli strikes have clearly caused damage to Iran's launcher infrastructure," said Kelly Grieco, senior fellow at the Stimson Center. "But Iran also seems to have also made a deliberate choice to change strategies."

The United States and Israel have conducted airstrikes against Iran's above-ground missile launchers, stockpiles, and underground missile storage factories. The United States can determine with certainty that it has destroyed about one-third of Iran's stockpile of missiles. According to the government of Israel, at least 70 percent of Iran's missile launchers and stockpiles have been destroyed since the start of the war.

"Over time, Iran has shifted toward smaller, more precisely targeted salvos aimed at specific high-value targets," Grieco said. Iran has struck radars and sensors that form the integrated air defense network shared by the United States, Israel, and Persian Gulf allies.

On March 26, President Donald Trump said that Iran had very few rockets left. "It's likely that the Trump administration and Israel have overstated how much they have degraded Iran's ballistic missile and drone capabilities," said Dr. Farzan Sabet, Iran expert at the Geneva Graduate Institute.

"The US and Israel may have also underestimated Iran's missile stockpile and launcher capacity," Sabet said.

The U.S. military has fired over 850 Tomahawk cruise missiles during the war.