Ze'ev Rosenstein, landed at Ben Gurion airport on Wednesday morning to continue serving his prison term in Israel. Rosenstein, 52, the Israeli described by US authorities as one of the world's biggest drug traffickers, was sentenced by US District Judge William Dimitrouleas to 12 years in prison, to be served in Israel as part of the deal. He was taken to Ayalon prison by Israel Prison Service personnel after having served two years of his sentence abroad. Rosenstein will remain imprisoned in Israel for an additional 10 years. AP contributed to this report.