Simplify the following text for a Grade 7 native English-speaking person.
Original: By the early 1950s , Rabat SalÃ Air Base was a U.S. Air Force installation hosting the 17th Air Force and the 5th Air Division , which oversaw forward basing for Strategic Air Command ( SAC ) B-47 Stratojet aircraft in the country .
Simplified: By the early 1950s , Rabat SalÃ Air Base was a U.S. Air Force based hosting the 17th Air Force and the 5th Air Division . These divisions oversaw forward basing for Strategic Air Command ( SAC ) B-47 Stratojet aircraft in the country .