Even the advanced two-stage focusing system has made its way from the T4i, which utilizes both phase-difference and contrast AF in order to achieve focus more efficiently when capturing video.
Such systems include all phases of the Phased Adaptive Approach to missile defenses in Europe, the modernization of the Ground-based Midcourse Defense system, and the continued development of the two-stage Ground-Based Interceptor as a technological and strategic hedge.
The minister then announced a two-stage study of the teacher training infrastructure, to consider the affordability of the current system and the options for a more shared and integrated system.