 And the unemployment rate is at 3.9%. That is down a fraction since May. Two Connecticut lawmakers are trying to grow the submarine construction workforce. WSHU's Molly Ingram reports the sector is looking to fill thousands of openings before the year is over. Groton-based Electric Boat is responsible for building both kinds of submarines that the U.S. Navy uses. Last year, the company hired more than 5,000 people.