The tragedy that would become the infamous USS Thresher incident began on April 30, 1961, when the submarine went underway to initiate sea trials from the Portsmouth Naval Shipyard in Maine.

KITTERY (WGME) - 61-year-ago this week, the USS Thresher submarine was lost at sea with 129 people on board in 1963 On Saturday, families of those lost held a memorial service at Traip Academy in ...