
A federal agency born in the aftermath of Sept. 11 when the primary concern was stopping terrorists from entering the U.S. is changing to meet new challenges, said the secretary of homeland security as he marked its 20-year anniversary during a ceremony Wednesday.
Alejandro Mayorkas highlighted emerging threats such as cybersecurity attacks and lone offenders radicalized online, but the Department of Homeland Security is perhaps most in the spotlight for its role in the country's immigration debate.