Groundloop.
I also wonder (well, I don't really lol) why the U.S. were so happy to have the Tu 144 Charger flying over the U.S. now that the whole threat from foreign SST's is over! It seems NASA like SST's and found them a valuable asset.
I have to say, that although I ignored West Coast's comment, but found it funny, I just wish his sense of humour would still function when talking of refuelling tankers or VIP choppers!