The U.S. State Department has reissued its Worldwide Caution warning of possible terrorist attacks around the world, including in the U.S., noting in particular the Homeland Security threat level shift from yellow (elevated) to orange (high). Because of this threat level, the Australian government has warned its citizens to be alert when traveling in the U.S. at this time. U.S. government facilities worldwide remain on heightened alert, and travelers should minimize time spent at facilities where Americans or other foreigners congregate.