Shellow saw something else: a deep distrust in urban communities. the PDP, a community policing initiative in Washington from 1968 to 1973, is the subject of an exhibit at the National Building Museum. the PDP, a community policing initiative in Washington from 1968 to 1973, is the subject of an exhibit at the National Building Museum. (Historical Society of Washington, D.C.), graphic_type=null, photo_path=/2010-2019/WashingtonPost/2018/04/11/Local/Images/KELLYCOL_102.JPG?uuid=K2OCej2xEeiVW30uGbeZZg, photo_width=300}, sub_type=Column, creator_by_item_role={By=[{image=https://s3.amazonaws.com/arc-authors/washpost/99bd61b1-7d39-4145-957e-a5e6a47bdca1.png, lastName=Kelly, role=Columnist, education=[{name=University of Maryland, BA in English}], longBio=John Kelly writes John Kelly's Washington, a daily look at Washington's less-famous side. (Historical Society of Washington, D.C.)