Sir - It may well be time for US carriers to dwell upon their previous track records when it comes to defining future strategies. Delta Air Lines, for example, currently "vocal of the month", is pressuring for increased codeshare capacity into Heathrow - not to mention its desire to obtain Heathrow slots in its own right.
I recall the 1960s, when Delta operated Douglas DC-8 services into Heathrow. One wonders why this (at the time) large US trunk carrier did not elect to hold on to such an international jewel as a slot at Heathrow.
If London is a must, why look further than Stansted - two out of three can't be all bad.
Malahide, Co Dublin, Ireland
Why didn't Delta hang on to Heathrow slot in the 1960s?
Source: Flight International