President-Elect Trump has asked retired Army Lt. Gen. Michael Flynn to serve as his national security advisor, according to several media reports that cited the transition team as the source. Flynn, 57, delivered a speech during the Republican National Convention in Cleveland this summer that was highly critical of the Obama administration’s security policies, and called for Democratic nominee Hillary Clinton to drop out of the race. Flynn is noted for speaking publicly about what he deems as a necessary mission to thwart Islamic terrorism. He had served as the director of the Defense Intelligence Agency under Obama, but was fired for expressing his dissatisfaction with the administration’s efforts to defeat terrorists.