 Complete the following phrase:  After the Invasion of Kuwait by Iraq in August 1990, the squadron was put on heightened readiness status awaiting possible deployment to the Gulf Region. At the time of the invasion, the 22nd Fighter Squadron was involved in the MSIP Multi-Stage Improvement Program upgrade of their F-15s and could not be deployed as a coherent unit. During December 1990, those aircraft that had completed upgrades, along with pilots and maintainers from the 22nd AMU Aircraft Maintece Unit, augmented their sister squadron, the 53rd Tactical Fighter Squadron, for deployment to Al Kharj AB, Saudi Arabia in support of 