The United States has approved 4,700 Syrian refugees who are awaiting resettlement to the country, while an additional 7,900 are awaiting security review, U.S. Homeland Security Secretary Jeh Johnson said on Thursday.

Johnson, speaking to a homeland security advisory panel at the Department of Homeland Security, was defending against critics who say the Obama administration is falling behind meeting its goal of bringing in 10,000 Syrian refugees into the country by the end of fiscal year 2016.