The chief of Iran's powerful Revolutionary Guard warned Monday that it will retaliate against American and Israeli commanders if the U.S. continues to threaten top Iranian generals. The U.S. killed Revolutionary Guard Gen. Qassem Soleimani, who headed the expeditionary Quds force, in a drone strike outside of Baghdad's airport in Iraq on Jan. 3. Five days later, Iran retaliated by launching ballistic missiles at two bases in Iraq housing American troops, causing injuries but no fatalities among soldiers there.