More air marshals on flights to Europe

WASHINGTON -- The United States is adding air marshals to overseas flights because of concerns about potential terrorism threats originating in Britain and Europe, the homeland security chief said Sunday.

"I think given what we know now, we're comfortable that we're at the right posture," Michael Chertoff said during a round of talk show appearances.

Airports are at the second highest of five security threat levels -- orange -- indicating a high risk of terrorist attacks.

-- The Associated Press