Iran shooting down two American military jets marks an exceedingly rare assault for the U.S. that hasn't happened in more than 20 years. It shows the Islamic Republic has a continued ability to hit back despite President Donald Trump asserting the country has been “completely decimated.” The last time a U.S. warplane was shot down in combat was during the 2003 U.S. invasion of Iraq. Experts suggest a shoulder-fired missile likely was used. Some analysts say the attacks reflect how Iran is “weak but still lethal."