the aircraft are too small to afford radar. The CESSNA wud have an updated GPS device that only shows the Aircraft that's using it (CESSNA) in this case. The cub is too small and would not have it. IFR communications would be too slow to receive flight updates in this case. Sounds like it happened in the amount of time a single transmission wud take. Too long for either of the pilots to react to. GOD I hope my friends weren't on those planes. PRAYERS TO THE FAMILIES