But the thing is, that the band went to the U.S. in two groups - one with Polish Airlines LOT, and the other - with German Lufthansa. All of them had exactly the same visas. All of them have been to America many times within last 2 years (having given almost 20 concert).
And now some of them were let in, and some not (including the leader). Those, who tried to discuss with the INS officers got “STFU” response (literally).