America american architecture blue building capital capitol cloud clouds cloudy columbia cyan DC democracy District dome edifice free government hill historic historical history image landmark of photo photograph picture pillar pillars politics power pride proud resource senate sky somadjinn states stock structure tourism travel united us usa Washington white access alert authorities authority availability available boat boating-control communicating communication control deployment equipment fast flag foam froth Hong-Kong law law-&-order light movement naval observation on-duty on-the-job order patrol patrolling presence regulations responsibility responsible sea secure security speed transport wake water watercraft badges barriers bilingual cars distinctive emergency-vehicle flashing-lights lights marked motor-vehicle police police-vehicle symbols traffic traffic-control van vehicle angles appearances arched architectural austere city closed-doors contrast contrasting dark decorated Designs detailed doors elements exterior external government-buildings gray grey grime handrails height heritage high linear lines old patterns quality reflections solid sound steps strength structures style support windows abstract aged art backdrop background beige brown burst concept creative decorative design digital dirty element energy flaking flaky graphic grunge grungy illustration impact New paint paper pattern peeling radiate rays render retro sepia shapes stained stripes stylish swirls texture textured trendy unique vintage worn out purple active adult bicycles bikes boy child crash-helmet cycling cyclist energetic environmentally-friendly exercise fit fitness helmets moving on-the-move outdoors park path pathway pedal-power pedalling public pushbike recreation safety safety-helmet shade shadows sport sporty sunlight sunshine track transportation travelling trees wheels