Definitely with article in the USA. There were twenty Concordes, so a lack of an article simply does not make sense in American English. In fact most people would probably go with the indefinite 'a' over the definite 'the' because there were more than one, but this would be affected by the context, as well. The would be referring to the category of airplane, while a would be for a be inferring a single member of that category. A proper name (sans article) would be alluding to one specific item/object/person/etc. If there was one specific Concorde that was named 'Concorde,' you could get away with omitting the 'the', but even then, 'the' still works perfectly well as a definite article and would probably be the preferred option.