but the aeromexico crash over cerritos brings it all home.y 1989, all aircraft operating up to 10,000 feet within 30 miles of terminal control areas must be equipped with transponders that convey altitude information. by 1993, all commercial carrier aircraft with ten seats or more operating within u.s. air space are equipped with traffic alert and collision avoidance systems. >> the culmination, beginning back with flight 122, going through the psa accident and finally through the cerritos accident were all building blocks to promote this technology which evolved into the modern system of tks which is a great predictive tool. >> the faa had to take the bull by the horn if you will and do something it try to prevent these accidents from occurring. we increased or enhanced radar coverage. we enhanced air traffic control communication with flight crews. they changed the air space. they actually created a system of controlled air space, trying to avoid or at least mitigate the risk that you were going to have these transient pilots flying through

i checked with those airlines and delta and aeromexico. and all of them had travel advisories and promised to waive fees if you wanted to change flights. >>> and several airports are dealing with a computer glitch. british airways had one in five flights delayed because of problem with the check-in system. the airlines' problems coming a month after delta suffered a global outage that led to three days of delays and cancellations. >>> the desperate search continues for a 24-year-old man missing since sunday at lake pleasant. this was breaking news yesterday at 11:00. that man disappeared while boating to celebrate the labor day weekend. and they lost track of their desperately searching for him. i spoke exclusively with the parents and they were visibly distraught as they looked out on the water, believing that their son is alive. >> he was a dreamer and we still believe that he's alive and well somewhere. we just don't know where. >> reporter: mcso has been out since sunday using sonar to look into the water. the family has been told the