 On 16 February 1962 a severe storm caused the Elbe to rise to an all-time high, inundating one fifth of Hamburg and killing more than 300 people.After German reunification in 1990, and the accession of some Eastern European and Baltic States into the EU in 2004, Hamburg Harbour and Hamburg have ambitions for regaining their positions as the region's largest deep-sea port for container shipping and its major commercial and trading centre.A group of radical Islamists that included students who eventually came to be key operatives in the 9/11 attacks, according to U.S. and German intelligence agencies, was called the Hamburg cell.