A June 1949 aerial photograph of the Portland waterfront shows the USS Sicily, an aircraft carrier, berthed at the Maine State Pier, a few yards from the Ocean Gateway terminal, where the Zumwalt, a guided missile destroyer, docked on Dec. 10, 2015.

The Zumwalt, a guided missile destroyer, is loaded with supplies and other needs while docked at the Ocean Gateway terminal in Portland on Dec. 10, 2015. Gabe Souza/Staff Photographer

The Portland Room of the Portland Public Library is in the process of organizing and conserving the archival collection of original Portland Press Herald, Maine Sunday Telegram and Evening Express photographic negatives — a major collection that spans from 1937 to 2005. Find more photos at www.pressherald.com/flashback/.