Mr. Speaker, from an air force officer to an infantryman, the role of the air force is to support the ground forces, in this case, the Iraqi ground forces, the equipment and the advantages that ISIL currently maintains on the ground, and enable the Iraqi troops to move forward and retake their own territory. The role, quite simply, is to destroy ISIL so it is no longer be effective and pose a threat to Canada.
In the House of Commons on March 30th, 2015. See this statement in context.