The Sovirt Buran shuttle had 5 boosters - the main Energia hydrolox core stage and 4 modified Zenit boosters. There were even plans to land the boosters and reu

The Sovirt Buran shuttle had 5 boosters - the main Energia hydrolox core stage and 4 modified Zenit boosters. There were even plans to land the boosters and reuse them, the main issue being how to get the massive boosters back from the endless wateland around Baykonur. Also unlike the Space Shuttle, the 5 boosters did all the orbital boosting, Buran only had small orbital correction engines on board (like Shuttle OMS), all big engines were down on the boosters.