Two Americans unaccounted for , senior U.S. official says . Obama says ` ` scourge of terrorism '' must be stopped . Algerian TV news : At least 55 people , including civilians and militants , have died . Yet that interest is coupled with pressure to make sure foreign nationals , and their business ventures , are safe . The militants attacked an eastern Algerian oil facility where many foreigners work .
Two Americans unaccounted for , senior U.S. official says . Obama says ` ` scourge of terrorism '' must be stopped . Algerian TV news : At least 55 people , including civilians and militants , have died . The militants attacked an eastern Algerian oil facility where many foreigners work .