Lehrer Dance, based in Buffalo, is known for its strong, inspiring, choreography. Internationally known. The eight-person troupe is just back from a European tour, and they’ll spend the next two weeks in Russia. [...] This is the fourth time Lehrer has led his dancers on a Russian cultural diplomacy trip.  The tradition started in 2012, when the United States Consulate in the port city of Vladivostock invited them.