 The back row had PAO (Public Affairs Officer), the "voice" of MCC; MOD, a management representative, depending on the phase of flight; either RIO for MIR flights, a Russian-speaker who spoke with the Russian MCC, known as Цуп, (Tsup); BOOSTER responsible for the SRBs and the SSMEs during ascent, or EVA responsible for space suit systems and EVA tasks; and finally, SURGEON.All US International Space Station operations are currently controlled from FCR 1, remodeled in 2006.This FCR abandoned the traditional tiered floor layout, with all rows instead at the same level.