We are on the lookout for criminal and terrorist activity but we do not - nor will we ever - monitor ideology or political beliefs. We take seriously our responsibility to protect the civil rights and liberties of the American people, including subjecting our activities to rigorous oversight from numerous internal and external sources.

It would be unwise to say the least, irresponsible of us at the TSA, at the Homeland Security Department not to evolve our technology to match the changing threat environment that we inhabit.

Nonetheless, to the extent that terrorists have come into our country or suspected or known terrorists have entered our country across a border, it's been across the Canadian border. There are real issues there.

Janet Napolitano Quotes