Former prime minister Tony Blair and ex-US president Bill Clinton have said the west must proceed methodically, but firmly, against the Islamic State (IS) group as it tries to increase its power in the Middle East.
Amid new airstrikes by the United States and some Arab allies against the headquarters of IS in eastern Syria, International Middle East envoy Tony Blair told MSNBC the situation "is nothing like the Cold War" and requires strategic adjustments from the west.
The former prime minister also said he thinks the Islamic State group wants to create a society that is not compatible with the modern world.
Mr Clinton said he believes Islamic militants want to lure American troops into a ground confrontation.
But the former US president also said in a CBS interview that the United States cannot let the militants make the fight "about us".