Barack Obama: Paris attacks terrible setback in fight against Islamic State
US president Barack Obama said the Paris terror attacks were a "terrible and sickening setback" in the fight against Islamic State, but showed no indication of substantially changing his approach to defeating the group.
Closing two days of talks with world leaders in Turkey, Mr Obama forcefully dismissed calls from critics - including some Republican presidential candidates - to send US ground troops into Syria.
He said taking that step "would be a mistake" and would not work unless the US was committed to being a permanent occupying force in the region.
Mr Obama said: "The strategy that we are putting forward is the strategy that is ultimately is going to work. It's going to take time."
Speaking in a measured tone, Obama said the US would intensify its campaign of air strikes and arming and training moderate forces. And he called on other nations to step up their involvement in the fight against the extremists.
The president also announced a new effort to share intelligence with France following the co-ordinated terror spree across Paris that killed at least 129 people.