The State Department urges American citizens across the globe to be cautious . Yemen , Algeria , Kenya and Somalia are considered particularly dangerous . Large cities or areas where Muslims gather could be targeted for extremist activities . American citizens abroad are encouraged to enroll in the Smart Traveler Enrollment Program .
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 . U.S. citizens abroad are encouraged to enroll in the Smart Traveler Enrollment Program .