clearance level
51Internal Drainage Board — An Internal Drainage Board (IDB) is a type of operating authority which occur in areas of special drainage need in England and Wales with permissive powers to undertake work to secure clean water drainage and water level management within… …
52football — /foot bawl /, n. 1. a game in which two opposing teams of 11 players each defend goals at opposite ends of a field having goal posts at each end, with points being scored chiefly by carrying the ball across the opponent s goal line and by place… …
53Air traffic control — For the Canadian musical group, see Air Traffic Control (band). Airport Traffic Control Towers (ATCTs) at Amsterdam s Schiphol Airport, the Netherlands …
54Three Sisters (Pittsburgh) — Infobox Bridge bridge name=The Three Sisters caption=View of Sixth, Seventh and Ninth Street Bridges from downriver carries=2 Vehicular lanes, 2 sidewalks crosses=Allegheny River locale=Pittsburgh, Pennsylvania maint=Allegheny County design=Self… …
55Viet Cong and PAVN battle tactics — Soldier of a NLF/Viet Cong Main Force Unit. They shared common arms, procedures, tactics, organization and personnel with PAVN. Viet Cong and PAVN battle tactics comprised a flexible mix of guerrilla and conventional warfare battle tactics used… …
56Chennai Port — (Madras Port) Chennai Port Location Country …
57Tenerife airport disaster — Tenerife disaster (KLM Flight 4805 and Pan Am Flight 1736) CGI rendering of KLM Flight 4805 immediately before it collided with Pan Am Flight 1736. Accident summary …
58Cyclo-cross bicycle — Giant TCX Cyclo cross bicycle outfitted for road riding A cyclo cross bicycle is a bicycle specifically designed for the rigors of a cyclo cross race.[1] Cyclo cross bicycles roughly resemble the racing bicycles used in road racing. Th …
59Gol Transportes Aéreos Flight 1907 — Computer generated image of Flight 1907 and N600XL about to collide. The Legacy s left winglet sliced off nearly half of the Boeing s left wing.[1] …
60Track and Field Sports — ▪ 2007 Introduction World Indoor Championships. At the International Association of Athletics Federations (IAAF) world indoor championships, held in Moscow on March 10–12, 2006, Russia and the U.S. divided up a majority share of the gold… …
