After the Paris attacks, many have noted that refugees pose little risk to the United States. Since the refugee program began in 1980, refugees have not committed any acts of terrorism in the U.S. If you include all humanitarian admissions under the Office of Refugee Resettlement--asylees, refugees, and others--since 1980, there have been just two terrorists out of 7.5 million, and these two came as children and grew up in America, not abroad.