Three of every four terror attacks last year took place in Iraq, Afghanistan, India, Pakistan, the Philippines, Somalia, Turkey, Nigeria, Yemen or Syria, according to the latest data from the Global Terrorism Database.
Staffan de Mistura ruled out any breakthrough at this week's negotiations to end a war that has claimed more than 320,000 lives and displaced more than half of Syria's population. But he pointed to a new ceasefire brokered with US and Russian help, covering three provinces in southern Syria, as one source of hope.
The US has warned Syria that it will pay a heavy price if it uses chemical weapons again. The White House also said Syria's allies, Iran and Russia, would be held responsible. The ratcheting of tension comes as regional powers compete for advantage in a post-ISIS world. The tension carries the risk of war.