House Intel chair's cryptic warning about "serious national security threat" prompts officials to urge calm

CBS News - For more and to sign up click here Washington — The head of the House Intelligence Committee disclosed Wednesday that members of Congress had access to information about an unspecified "serious national security threat," issuing a vague warning that prompted other lawmakers to downplay the urgency of the situation and urge the public to remain calm.The revelation from Rep. Mike Turner, an Ohio…