Since the Iron Curtain oxidized, some Americans of Eastern European extraction have forged new connections with their ancestral homelands. Few, however, have used the link to get a gig at a major European rock festival—which is just what Hazmat lead singer Paul Vesilind has done. The son of a Estonian émigré who settled in Northern Virginia, Vesilind will take his “heavy alternative” band to Tallinn, Estonia, for Rock Summer, a three-day festival that begins July 10. According to Hazmat, the band will be the only American act on the Baltic bill, which includes such durable U.K. bands as Simple Minds and Mike and the Mechanics. Before playing to a crowd expected to approach 100,000, Hazmat will warm up with some gigs at smaller venues, including June 29 at Arlington’s Strangeways and June 30 at Fairfax’s Planet Nova.