Washington has crept to a decision. It's time to do something about the threat posed by the Islamic State.
There's now no lack of senior officials describing the problem.
"This is an organisation that has an apocalyptic, end-of-days strategic vision and which will eventually have to be defeated," General Martin Dempsey, Chairman of the Joint Chiefs of Staff, said.
"They are beyond just a terrorist group. They marry ideology, a sophistication of ... military prowess. They are tremendously well-funded. This is beyond anything we've seen," said his boss Chuck Hagel, the US Secretary of Defence.
But how do you solve a problem on this scale?
Militarily there may be a short term effect from intensifying American airstrikes.
Car used by IS fighters is destoyed in a US airstrike Widening the target list of IS forces across Iraq to include vulnerable areas on the edge of the Kurdish region and around Baghdad would at least stem the tide.
It might also buy some time for specialists to re-train the Iraqi army and for the central government to form a more inclusive administration involving Sunnis who for now may be supporting the IS.
But rolling back the IS in Iraq would take a much bigger air campaign.
That would risk killing Sunnis and painting the Baghdad government as lackeys of American imperialism.
And pushing IS back in Iraq would still leave its Syrian heartland as a base from which to continue to launch attacks, as well as terror operations beyond its borders.
Red shows areas controlled by IS, yellow shows areas of fighting "To your question, can they be defeated without addressing that part of their organisation which resides in Syria? The answer is no. That will have to be addressed on both sides of what is essentially at this point a non-existent border," General Dempsey said.
So airstrikes against IS in Syria may be called for - even if this risks empowering the Damascus regime.
Syria has complex air defence systems. If it did not approve of the attacks on its enemy, IS, then these would need to be destroyed to allow for an effective air campaign against the Islamic state.
A rapidly widening air war could lead to more complexities on the ground.
Amid all the talk of attacking IS, many ordinary people, voters, in the West may favour a 'leave-well-alone' policy.
With the US and UK political elite facing elections next year this view may concentrate their minds on sitting on their hands.
Journalist James Foley was beheaded on video by an IS militant
Kurdish Peshmerga are leading the fightback against IS in Iraq
PM designate Haider al Abadi is trying to form a more inclusive government
Diyala has seen heavy fighting between Iraqi troops and IS. File pic
Peshmerga are fighting to gain territory from militants north of Baghdad
The US says the killing of James Foley was a "terrorist attack" on America
John and Diane Foley, the parents of James Foley
James Foley working in Syria in 2012. Pic: Manu Brabo
Ukraine insisted the aid convoy entered under the auspices of the Red Cross
President Poroshenko is due to meet Russia's leader next week
Ukraine said it captured two Russian armoured vehicles
Sources said Germany's Angela Merkel would push for a ceasefire
The 280-truck convoy departed from near Moscow more than seven days ago
A Kurdish peshmerga fighter
James Foley in Libya in 2011
A rough outline of the caliphate declared by IS militants
Militants vowed to attack US targets in another video clip
The fighter who killed James Foley
It has been claimed IS demanded a multi-million dollar ransom for Mr Foley
John and Diane Foley said their son in 'now in heaven'
The aftermath of the airstrike that failed to kill Mohammed Deif
Smoke billows from Gaza following an airstrike
Militants have also threatened to kill Steven Sotloff
James Foley disappeared in Syria in November 2012. Pic: Nicole Tung
Private security guards may be set to return to Iraq. Pic: Pete Norman
An MP5 sub-machinegun used by a security detail in Iraq. Pic: Pete Norman
Mr Foley in Syria before he was captured. Pic: Nicole Tung
The three men are being held at a secret location
Michael Brown was shot dead nine days ago
The protests descended into chaos after nightfall
Rapper Nelly added his voice to the protests
Police shot tear gas to disperse the protesters
Mr Obama has authorised limited missions in Iraq
Both sides had been locked in fierce fighting around Mosul Dam
Some protesters have defied the curfew
The demonstrations have been going on for a week, with most being peaceful
Calls to demilitarise police have mounted
The UK is considering arming peshmerga troops fighting IS extremists
A US airstrike against an IS position near Mosul Dam
Michael Fallon says Britain's involvement could last 'weeks and months'