 Complete the following phrase:  Eurojust was established as a result of a decision that the European Council of Tampere 1516 October 1999 made to set up a permanent judicial co-operation unit in order to improve the fight against serious crime. The Treaty of Nice amended the Treaty on the European Union to include a reference to Eurojust. On 14 December 2000, a precursor organization called Pro-Eurojust was created by the Council of the European Union to permit prosecutors to test the Eurojust processes. It began operating in Brussels on 1 March 2001. The 