Metal Gear Solid 5 to take in Africa?

During an interview with French IG Magazine , Kojima  confirmed there will be a Metal Gear Solid 5.

According to PSM3 magazine ,they revealed  Metal Gear Solid 5 will take place in Africa  around the 70s  featuring  Big Boss and possibly   live the moments of creation of Solid Snake.
Kojima is trying  to gather alot of clues for  Metal Gear Solid 5. An important clue lay in Big Boss poster  “Big Boss needs you” “Diamond Dogs.” We have no idea what this mean but we will import a picture of it down below.

Kojima  being a fans fan of David Bowie perhaps his referring too his album and have something to do with MGS 5.