COP21: on eve of UN climate conference, Ban says 'time for action is now'
Burkina Faso: with elections under way, Ban calls on all parties to ensure peaceful polls
UN strongly condemns attack on base in northern Mali that kills two 'blue helmets' and a civilian contractor
In Malta, Ban urges Commonwealth leaders to join UN in 'final push' to wipe out polio
West Africa cannot recover from Ebola epidemic on its own – senior UN health official