Already been stripped in 1980 of its license to WNAC - TV in Boston , RKO was left with no choice .
Already been stripped in 1980 of its license to WNAC - TV in Boston , RKO was to break up its broadcasting unit .
Already been stripped in 1980 of its license to WNAC - TV in Boston , RKO was left with no choice but to break up its broadcasting unit .