The U.S. government thorough screens refugees’ background – an intensive process involving the Departments of Homeland Security and State, the Federal Bureau of Investigation, and national intelligence agencies. It takes 18 – 24 months for the checks for proposed refugees to the U.S. to be conducted (compared to four months in Canada). For the 784,000 refugees settled in the United States since Sept 11, 2001, three have been arrested for planning terrorist activities – two of whom were planning attacks outside the country. – from the Migration Policy Institute, “Ten Facts about U.S. Refugee Resettlement,” October 2015.
Since the Sept. 11, 2001, attacks, of 180 people charged with jihadist terrorism-related crimes in the U.S. or who died before being charged, 11 were identified as being from Syria, Iraq, Iran, Libya, Yemen, Sudan or Somalia, the countries specified in Mr. Trump’s order, according to an analysis of data on the attacks by The Wall Street Journal.” – the Wall Street Journal, January 31, 2017