Democratic congressional leaders say improving energy security is a priority. But while there is broad interest in lessening U.S. dependence on foreign oil and in promoting renewable fuels, comprehen…

Since 9/11, much of al-Qaeda’s operational capacity has been dismantled but experts say the group’s strength now lies in its ability to inspire others to carry out terrorist attacks.

Gen. David Petraeus’ assertions about falling casualties in Iraq are supported by a range of objective sources. But his testimony to Congress does not establish whether the decline is attributable to…