Video shows a recent suicide attack on government troops in northern Syria . Radical American : 21 of the attackers is American , identified as U.S. . Regardless , if his U.S. nationality could somehow be confirmed , it would n't be a total surprise . Abu Hurayra official : Man likely had an American connection , but it 's not fully confirmed . U.S. officials have expressed concerns about Americans fighting in U.S. .
Video shows a recent suicide attack on government troops in northern Syria . Radical American : 21 of the attackers is American , identified as U.S. . Abu Hurayra official : Man likely had an American connection , but it 's not fully confirmed . U.S. officials have expressed concerns about Americans fighting in U.S. .