Recent Activity Shows Turkey is Vulnerable to Islamic State Incursion

Officials have raised concerns that a deadly bombing in southeastern Turkey is part of a campaign of retaliation by the Islamic State group for a recent crackdown on its operations in the country.
The country shares a 775-mile border with Iraq and Syria, putting it nearby to strongholds of the self-proclaimed Islamic State.
As recent arrests show, the extremist group already has established its reach into Turkey.
Authorities fear that Monday's bombing in the town of Suruc is a warning by the extremists.
A reported 32 people died with nearly 100 wounded by the blast.
No one has claimed responsibility for the Monday's bombing; Turkish officials have offered little evidence that the Islamic State was involved.
Social media affiliated with the Islamic State group have been conspicuously silent.