Hasan is a U.S.-born Muslim of Palestinian descent whose parents came to the United States from the West Bank. He joined the military after high school and earned medical degrees as he rose through the ranks, family members said. 'snip' Hasan attended the Muslim Community Center in Silver Spring and was "very devout," according to Faizul Khan, a former imam at the center. Khan said Hasan attended prayers at least once a day, seven days a week, often in his Army fatigues.