The U.S. has about 4,000 troops stationed at Camp Lemonnier, which serves as a base for U.S. operations against jihadis in Somalia and Yemen. Djibouti is on the Horn of Africa across the Gulf of Aden from southwestern Yemen.
During this flight suspension U.S. military aircraft cannot operate from either the commercial airport or from the U.S. military base.
The officials could not say how long the aircraft would be grounded or what impact it is having on U.S. military operations in the region.