let's speak to dr michael mccormick, who's an associate professor and programme coordinator in air traffic riddle aeronautical. i wonderfirst of i wonder first of some comment from yourself regarding the crash in philadelphia?- from yourself regarding the crash in philadelphia? yes. i actually worked _ crash in philadelphia? yes. i actually worked as _ crash in philadelphia? yes. i actually worked as an - crash in philadelphia? yes. i actually worked as an air- actually worked as an air traffic control in philadelphia for ten years. and i am heartbroken to have watched the video of that leo going straight down into the ground, a young child, her mother, and the air crew on board.— the air crew on board. let's 'ust the air crew on board. let's just return _ the air crew on board. let's just return to _ the air crew on board. let's just return to the _ the air crew on board. let's just return to the ongoing l just return to the ongoing investigations following the crash in washington, dc, so many questions now about what could have caused it, and a lot of attention on air traffic control, so

former air traffic controller and associate professor at embry-riddle aeronautical university, michael mccormick. michael, great to see you. so, um, as we learned that there may be some readout information coming from some of these voice and data recorders. what will be important, in your view to hear to to have a better understanding of the communication between these aircrafts and the control tower. >> we already have the record data of the voice communications between the aircraft and the control tower. what i'm curious to see now, and i think is vital to see now, is what is the conversation that took place inside the cockpit of the american aircraft? that will give an idea of what actually was transpiring on board. the same would hold true for the black hawk. if we could get voice recordings and cockpit recordings out of black hawk, that would be vital to figure out what were the pilots intent? what were they trying to do? what did they see? what didn't they see? >> okay. because in some of the radio tower communications, we did hear an acknowledgment coming from the black hawk pilot that, y

dr michael mccormick is an associate professor and program coordinator in air traffic management at embryal — he told me air traffic control will be one area investigators focus on. certainly air traffic control needs to be looked at in detail. communication, procedures, technology and staffing are all procedures, technology and staffing