 Complete the following phrase:  During the last years of his 75-year-long career Szukalskis major projects as a sculptor were Prometheus 1943, designed for Paris in homage to the French partisans; the Rooster of Gaul 1960, a gigantic and complex structure that he wanted the U.S. to give France to reciprocate for the Statue of Liberty; Katyn 1979, a monument to commemorate the death of more than 20,000 Polish officers and intellectuals 