Thursday 's announcement replaces one issued in January . The State Department urges U.S. citizens across the world to be cautious . Yemen , Algeria , Kenya and Somalia are considered particularly dangerous . Large events or areas where tourists gather could be targeted for extremist attacks . Comment:
The State Department urges U.S. citizens across the world to be cautious . Yemen , Algeria , Kenya and Somalia are considered particularly dangerous . Large events or areas where tourists gather could be targeted for extremist attacks . Comment: