 Complete the following phrase:  He later returned to Europe using a false passport travelling the migrant route from Syria to Turkey to Leros, Greece where he presented himself on 20 September 2015 as Naïm Al Hamed identified as a Syrian national born on 1 January 1988 and originating from Hama, Syria according to the falsified papers. Under this guise as Naïm Al Hamed, he continued to Europe residing in Belgium. The beginning of October 2015, Krayem allegedly met Salah Abdeslam in Ulm, Germany to discuss possible cooperation in terrorist attacks. Abdeslam was one of the Belgian suspected terrorists involved in the 13 November 2015 