Islamic terrorists—including two al Qaeda affiliates indicted last year in Kentucky—have entered the United States legally through a resettlement program that helps tens of thousands of “the world’s most vulnerable refugees” start a new life in America each year. Known as the U.S. Refugee Admissions Program (USRAP), it’s a joint venture between the State Department and U.S. Citizenship and Immigration Services (USCIS), the Homeland Security agency that oversees the nation’s lawful immigration. The two agencies are responsible for deciding which refugees are granted USRAP resettlement consideration. USCIS is hands on and conducts individual, in-person interviews with applicants to determine if...