Yesterday there was a mid-air collision between a Piper Cheyene and a Cessna 172 over a populated area of Denver. The last news report I saw last night reported the there were at least 3 fatalities, possibly 4. These were people in the two planes. There were several injured people on the ground but it was reported that all were treated and released. This is terrible, but it could have been a lot worse. My thoughts are with the families and freinds of the victims.