The order claims that since 2001, hundreds of people born abroad have been convicted of terrorism-related crimes in the United States, and that more than 300 people who entered the country as refugees were the subject of counterterrorism investigations. It cites two specific examples: Two Iraqi nationals who came to the United States as refugees in 2009, it says, were convicted of terrorism-related offenses, and in October 2014, a Somali native brought to the country as a child refugee was sentenced to 30 years in prison for plotting to detonate a bomb at a Christmas tree-lighting ceremony in Oregon. That man became a naturalized U.S. citizen.