He is ordering steps to improve airport security and the handling of intelligence information.

VOA: special.2010.01.09

On the other hand, some information must be protected from public disclosure for the sake of our security -- for instance, the movement of our troops, our intelligence-gathering, or the information we have about a terrorist organization and its affiliates.

WHITEHOUSE: President Obama: Our Security, Our Values

Following a thorough investigation, we found that Mr. Gill exceeded all requirements set forth by the department's Office of Security for access to classified information, as prescribed by the intelligence community, that allows him to conduct his day-to-day duties for the department.

CENTERFORSECURITYPOLICY: Islamist penetration of Homeland Security?

U.S. Homeland Security chief Tom Ridge said Tuesday that a "confluence" of information from intelligence sources led to the warning.

CNN: Information from Canada helped lead to alert, official says