A senior Iranian official has warned Tehran will set U.S. troops "on fire" and attack American allies in the Middle East if the White House puts ground troops onto Iranian soil. Iran's military is "waiting for the arrival of American troops on the ground to set them on fire and punish their regional partners forever," Mohammad Bagher Ghalibaf, Iran's powerful parliamentary speaker, said on Sunday. Ghalibaf spoke shortly after roughly 3,500 U.S. Marines arrived in the Middle East, along with