Coast Guard heavy icebreaker Polar Star at McMurdo research station in Anarctica. ((U.S. Coast Guard photo by Petty Officer 2nd Class Grant DeVuyst) WASHINGTON — The Coast Guard awarded Bollinger Shipyards a $951 million contract modification to advance the detail design and construction of the service’s upcoming heavy icebreaker program, a ship that will play a crucial role in allowing the Pentagon to operate in the High North. The Polar Security Cutter program, a top acquisition priority for