![airplane_-_thinsktock1.jpg](https://assets2.cbsnewsstatic.com/hub/i/r/2014/12/01/96625009-e5b2-485e-8727-42703532e3af/thumbnail/640x360/af2878b3a757e8a1cd1a633aa527cb14/airplane_-_thinsktock1.jpg?v=e2b758f558b9b19612f3e16bc7fd9fcc#)
U.S. Issues Travel Warning As Pittsburgh International Preps For Busy Holiday Week
Americans should be alert to the possible travel risks, especially during the holidays, following increased terrorist threats around the world, the State Department warned on Monday.