Trump threatens Turkey after US troops pullout

President Trump has threatened Turkey with dire consequences if it goes too far in northern Syria, as he faces a growing backlash over his decision to abandon America's Kurdish allies.

Also in the programme: We'll hear from one of today's three Nobel prize winners for medicine; and a BBC investigation exposes how exam results are being traded for sexual favours in Africa.

(Photo: A Turkish tank arrives at an army base in the border town of Reyhanli. Credit: Reuters)