Sikorsky Aircraft employees celebrated the unveiling of a new helicopter display in Stratford this morning. Sikorsky officials say the UH-60 Black Hawk was first used by the Army in 1979. Company President Jeffrey Pino says the chopper represents reliability and strength. "This thing transports the president of the United States," said Pino. Company representatives say more than 20 countries currently use Black Hawk choppers for military operations.