“I believe this is going to require more than the Department of Homeland Security,” Janet Napolitano said Wednesday during her first Capitol Hill appearance since her confirmation last month as homeland security secretary.

“So we are reaching out to the national security adviser, to the attorney general and others about how we within the United States make sure we are doing all we can in a coordinated way to support the president of Mexico,” said Ms. Napolitano, explaining that containing border-related drug violence will require more than the 22 agencies and 200,000 employees in her department.