Unfortunately these tragedies are so public. I hope the news media will grant the 7 crew members' families some time to grieve in private.Will we, the public, ever really know what happened? Just about seventeen years ago the "Challenger" blew up just after liftoff because of a frozen O-ring or two. Will the cause of this accident be so innocuous seeming? The only clue so far is that a bit of insulation broke off the rocket engines during liftoff and may have damaged some heat shield tiles on one of the wings. The grisly evidence is spread over Texas. Let's hope the various U.S. bureaucracies will eschew finger pointing and just find out what happened and how to prevent its reoccurence.