(CNN) -- President Obama pledged Saturday that the United States will hold accountable all of the individuals involved in the failed Christmas Day terrorist attack aboard a U.S.-bound jetliner. "All those involved in the attempted act of terrorism on Christmas must know you, too, will be held to account," Obama said in his weekly address. Obama also recently spoke with Homeland Security Secretary Janet Napolitano to receive an update on a federal review of "detection capabilities and ... enhanced security measures" put in place since the attempted bombing. A new Transportation Security Administration directive requires airlines to physically pat down...