Updated 12.20
The US is asking all countries in NATO to do more to take on Islamic State.
It comes as a debate begins in Britain's House of Commons on whether RAF airstrikes should be extended to Syria.
America's Secretary of State John Kerry says he hopes David Cameron gets support for the action:
"It's a very important step. We applaud his leadership on it. I hope that the parliament will vote to grant that."
He tweeted after a NATO meeting this morning, calling it "productive".
Productive meeting with @NATO counterparts, FM @PavloKlimkin on #Ukraine partnership and training initiatives.
— John Kerry (@JohnKerry) December 2, 2015
MPs debate strikes
Earlier the UK's Foreign Secretary Philip Hammond dismissed suggestions that comments Prime Minister David Cameron made about "terrorist sympathisers" have jeopardised the vote on Syria airstrikes.
David Cameron is still expected to win a majority of support in parliament when MPs vote on strikes this evening, though public support has dropped.
Addressing MPs this afternoon, David Cameron outlined his position: "They've inspired the worst terrorist attack against British people since 7/7 on the beaches of Tunisia and they've plotted atrocity after atrocity on the streets here at home."
"So this threat is very real and the question is this do we work with our allies to degrade and destroy this threat and do we go after these terrorists in their heartlands, from where they are plotting to kill British people, or do we sit back and wait for them to attack us?"
Michael White, Assistant Editor at The Guardian, told Newstalk Breakfast some Labour MPs are getting a bit jittery:
Labour veteran Ken Livingstone, who is in charge of the party's defence review, last week blamed the 7/7 terrorist attack on Tony Blair and said the bombers "gave their lives" for a cause they believed in.
Mr Hammond meanwhile reiterated his support for airstrikes saying: "This is a fight that we are already in. It is a fight that we cannot avoid because Isil Daesh is already targeting us."
He said the UK had to take the fight to IS before the terrorists "bring the fight to us, as they did on the streets of Paris".
Support wanes
Public support in the UK for airstrikes against IS in Syria is waning.
A YouGov survey for The Times found the percentage of people in favour dropping from 59% to 48%.
It also showed those against rising from 20% to 31% ,with undecideds unchanged on 21%.
Parties split on vote
Around a dozen Conservative MPs could vote against their own leader on military action.
But up to 50 Labour MPs are expected to back strikes, despite a furious backlash from anti-war campaigners and opposition from leader Jeremy Corbyn.
The Democratic Unionists and the Liberal Democrats are also backing airstrikes - which could give the Government the majority needed.
Mr Cameron last week set out his strategy, but his foreign affairs select committee said he "has not adequately addressed concerns" in key areas.
As part of the debate, Irish charity GOAL is due to brief MPs on its work on the ground with Syria.
