Interestingly enough, Erdogan mentioned Brussels as a potential target by name.

Only four days before the Brussels attacks, Erdogan spoke at a commencement ceremony for the 101st anniversary of the Battle of Gallipoli in Canakkale, Turkey on March, 18 where he stated that

"there is no reason why the bomb that exploded in Ankara cannot explode in Brussels, in any other European city."

"The snakes you are sleeping with can bite you any time," he added.

While ISIS, a Western-created and NATO-directed terrorist organization, has claimed credit for the bombings, it should be pointed out that Erdogan was referring to "Kurdish militants," whom Turkey considers terrorists.

Turkey, the United States, and Belgium all consider the PKK a terrorist organization but the West has been working closely with the Syrian Kurds (PYD,YPG) on the ground in Syria for their own geopolitical agenda.

Nevertheless, Erdogan's statement is interesting considering the fact that the Brussels attacks came shortly after his warning which predicted not only the attack but the location.