"We have no credible threats to us right now."

DHS Sec Markwayne Mullin stresses there are "no credible threats" to the U.S. following an attack in the cockpit of a Flydubai flight, adding that aviation security officials are reviewing current safety procedures.

"We take every incident like this very serious, and we continue to look at the procedures, that we have in place and continue to make sure the American people are safe.