Firefighters battled crumbling ice in Long Island Sound to rescue two people trapped after a truck broke through and sank in the frigid waters beneath, authorities said on Tuesday. Social media images of the incident near the Connecticut city of Stamford showed rescuers extending an aerial ladder over the ice to reach the couple in the sinking vehicle. “The extreme winds, snow and tide continued to move the vehicle and cause it to fill with water,” Matt Palmer, deputy chief of the Stamford Fire Department, said on its website, adding that the mishap came at the peak of a nor’easter storm. Snow up to 2 feet deep was dumped across the northeast on Monday and Tuesday, killing three people and shutting down transport. Some of the Stamford rescuers, wearing yellow protective suits, swam through the freezing waters of the Sound to pull the white pickup truck’s occupants to safety before …