Simplify the following text for a Grade 8 native English-speaking person.
Original: SAC felt the Moroccan bases were much less critical with the long range capability of the B-52 Stratofortresses that were replacing the B-47s and with the completion of the USAF installations in Spain in 1959 .
Simplified: SAC felt the Moroccan bases were much less critical with the long range capability of the B-52 Stratofortresses that were replacing the B-47s . It also had completed USAF bases in Spain in 1959 .