London and into the Home Counties with a branch to Heathrow Airport. It is Europe's biggest construction project, with a £15 billion projected cost. London is the centre of the National Rail network, with 70 per cent of rail journeys starting or ending in London. Like suburban rail services, regional and inter-city trains depart from several termini around the city centre, linking London with the rest of Britain including Birmingham, Brighton, Reading, Bristol, Cardiff, Derby, Exeter, Sheffield, Southampton, Leeds, Liverpool, Manchester, Cambridge, Newcastle upon Tyne, Edinburgh and Glasgow. Some international railway services to Continental Europe were operated during the 20th century
Groton–New London Airport of the nearby US Coast Guard Academy. Groton–New London Airport was established as the first State of Connecticut airport in 1929. Originally called Trumbull Airport after Governor Jonathan Trumbull, the airport was taken over by the United States Army Air Corps in August 1941 as a First Air Force group training base, although the runways were still grass. In 1942, the Army constructed a base and hard-surfaced runways and designated the airport as Groton Army Airfield. Through all of 1943, a total of 10 squadrons of P-47 Thunderbolt fighter groups trained at the field, with the last unit departing for