Radio Netherlands: Four hundred years after the English explorer Henry Hudson discovered ‘by chance’ what is now known as Manhattan, the Dutch are returning. Henry Hudson was actually trying to find the shortest route to India, but in 2009 the Dutch have a very different mission. They want to protect the island of Manhattan, and the city of New York, from the rising sea water. New York’s sea defences need major reconstruction to bring them up to the present-day standards of those in the …