What years did TWA fly PHL-LHR (this would be pre-1990)
Did AA ever fly PHL-LHR after TWA sold the slots to AA?
If AA did not operate it, did AA sell the London authority to USAirways, or did TWA sell it as a condition to get the other LHR slots sold?
Did AA ever fly PHL-LHR after TWA sold the slots to AA?
If AA did not operate it, did AA sell the London authority to USAirways, or did TWA sell it as a condition to get the other LHR slots sold?