90-year-old U.S. Army veteran says the U.S. government has been confusing him with a Chechen ISIS member known as "Akhmed the One-armed," for the past three years,  creating frustrating travel delays and resulting in lost mail. Wondering why he would be considered "a denied party," Mayer took to Google, eventually discovering that a Chechen militant called Akhmed Chatayev had once gone by the name David Mayer as one of several aliases. According to the Counter Extremism Project, Chatayev, who was born in Russia, is believed to be missing his right arm and left leg, explaining his nickname. He is wanted by Russian authorities for terrorist attacks perpetrated in his birth country as well.