thank. ou fo m i'm joined now by steve cowell in colorado — an aviation expert from the university offirst of all, you give our viewers some context aboutjust how deadly, how horrific this how deadlyrhow horrific this has been when we it to or compare it to other crashed or in the past? compare it to other crashed—cc - in the past?- collisions in the past? well, to ut collisions in the past? well, to put things _ collisions in the past? well, to put things in _ collisions in the past? well, | to put things in perspective, we have millions of flights we have millionsof flights have we have millions of flights have place we have millionsof flights have place the that have taken place since the midair collision in 1986 in the united states. that time, an instrument since thatetiroe, an instrument tcas since thatetime, an instrument tcas has been installed every commercial z— z: 7 to aid in the of midai have been millions of flights. the system not perfect, but it is still lssnot perfect,-but it is still very lysinot perfect,-but it is still very safe. tsinot erfect -but' ' ' m——~, tsinot