Initial Training in this MOS is primarily conducted through One Station Unit Training (OSUT), which combines basic training and job training into one single course of instruction. 1  OSUT for 11B, Infantryman is 13 weeks, 3 days at Fort Benning, Georgia.
The Seikan Tunnel in Japan and the Channel Tunnel between the United Kingdom and France are both in excess of 50 km (31 mi). Under construction since 2002 and projected open in late 2016, the Gotthard Base Tunnel (a second rail tunnel, 57 km long), will be the world's longest.
World's longest rail tunnel to open in Switzerland under Alps. World's longest rail tunnel to open in Switzerland under Alps. Measuring 57 km in length, situated 2.3km deep under the Alps and having cost â¬11bn to complete, Switzerlandâs Gotthard base tunnel is more than just the worldâs longest and most expensive tunnelling project.