First up today, we go to Kiev to talk to the internationally known academic Olexiy Haran for an on-the-ground description of life in the embattled city.  And why morale remains so high.  But it's also Monday and we hold true to our weekly commitment to stay on the pandemic story with a focus this week on masks and the push to end use of them.  Science Sam, Dr Samantha Yammine is with us for that.