Several Polish journalists reporting the event were arrested.
Another polished a report about local officials who refused to allow private trucks to be used for desperately needed public transportation.
He is less strongly disliked in Poland and other Eastern European countries, however, and Polish media reported that the Polish government arranged to bring busloads of people in to cheer Trump at his speech.
The jug was in such immaculate condition, shining as if newly polished, that they reported it to the police as well as the archaeologists, in case it had been stolen recently.
According to Polish reports of the incident, the president was furious and declared: "If someone decides to become a pilot, he can't be a coward".
The team, appointed by the Polish defence minister, Antoni Macierewicz, announced preliminary findings on Thursday, and said the 2011 Polish report was the result of "falsifying, manipulating, avoiding, and hiding" the truth.
The Polish report does not shy away from putting much of the blame on Polish officials and procedures, saying the pilots had had insufficient training to fly the plane, a Tupolev 154.
The Polish report found that while Mr. Kaczynski's aide entered the cockpit to learn about the prospects for landing at Smolensk, there was no order from the president to land.
A Polish report into the 2010 plane crash in Russia that killed President Lech Kaczynski and 95 others says Russian air traffic controllers gave pilots incorrect and confusing landing instructions, a finding that could test already strained ties between the two countries.
Kansas University students have put in the donkeywork this semester, researching companies, polishing reports and putting together performances to earn an approving nod and perchance an agreement to invest from the septuagenarian billionaire who will be paying heed in the audience.
