Migrants who successfully crossed the Eurotunnel terminal walk on the side of the railroad as they try to reach a shuttle to Great Britain, on July 28, 2015 in Frethun, northern France. About 2,000 migrants tried to enter the Eurotunnel terminal in the French port town of Calais overnight in a desperate bid to reach England through the Channel tunnel, a spokesman said July 28. AFP PHOTO / PHILIPPE HUGUENPHILIPPE HUGUEN/AFP/Getty Images