Challenger 1 tanks English Challenger 1 tanks Challenger Challenger 1 tanks Challenger 1 tanks Challenger 1 tanks Challenger 1 tanks Challenger 1 tanks ROF Challenger 1 Challenger 1 Challenger 1 Challenger 1 FV4030/4 Challenger 1 Challenger I MBT Challenger 1 tanks Challenger 1 https://en.wikipedia.org/wiki/Challenger_1 Challenger 1 Challenger 1 tanks English ROF Challenger 1 ROF Challenger 1 English Challenger 1 tanks Challenger 1 Challenger 1 tanks http://en.wikipedia.org/wiki/Challenger_1 Challenger 1 tanks Challenger 1 tanks English Challenger 1 tanks Challenger 1 tanks