I give my grievances to the families of the astronauts. It was an unfortunate tragedy. But of course the astronauts and people in NASA knew the risks.
Honestly, I feel a lot of the stuff NASA does is a waste of time, money and an unnecessary risk to human lives. Seriously, what did we get from putting a man on the moon, rover on mars, and sending a satellite to take pictures of Jupiter? It seems pretty childish to me. I do know there have been many scientific advances made because of space exploration, and that the astronauts did actually perform some important experiments in the past two weeks they were in space. But in my opinion, there are more important things going on in the world and in the United States.
Just my 2cents.