If you have been following recent events in Syria you will know that Syrian government forces have been advancing on several fronts in western Syria.
You might also be aware that many Syrian rebel forces have been withdrawing northward towards the areas around (mostly north of) Aleppo and to northeastern Syria, east of the Euphrates.
People in Turkey are also aware of this and there has been increasing discussion about what this might mean for Turkey.
There is growing public apprehension that if Syrian rebel groups continue to lose cohesion and Syrian government forces continue to press northward it is very possible that Turkey might be faced with waves of armed former rebel fighters trying to cross the border into Turkey.
There is also great concern that these men will probably have radical views and agendas.
And there is anger and resentment that if this were to happen, Saudi Arabia, Qatar and western countries will do nothing to help deal with the problem.
The Turkish government seems to be aware that this is a very real possibility, even though it has not commented on it publicly, and there are indications that the government is taking some unpublicized steps in preparation.
I have been hearing recently of an increasing number of incidents along the Turkish-Syrian border where Turkish police or soldiers have shot men who were trying to cross the border from Syria to Turkey. The justifications have been that these men were smugglers. I have also noticed that more restricitive measures are slowly being put into practice at the Turkish-Syrian border crossings and that the government is making plans to increase security at these border crossings.
As a bizarre side note - I had a conversation with someone connected to the Syrian opposition this weekend. He insisted that the reason that the west, and Saudi Arabia, and Qatar were cutting their support for the rebels was because Turkey was their real target. Their real plan has been for the rebels to lose so that they will have to escape to Turkey, which will cause instability in Turkey and weaken the country.