Ukrainian and separatist forces have begun the process of exchanging prisoners of war as part of a ceasefire agreement. It is the most promising sign yet that the ceasefire between Ukrainian forces and pro-Russian separatists can last. Al Jazeera's Robin Forestier-Walker reports from Donetsk. Subscribe to our channel http://bit.ly/AJSubscribe Follow us on Twitter https://twitter.com/AJEnglish Find us on Facebook https://www.facebook.com/aljazeera Check our website http://www.aljazeera.com/
