Answers

The Columbia Accident Investigation Board has released its results. No surprises; a chunk of insulating foam on the external tank struck the reinforced carbon-carbon on the leading edge of the orbiter's left wing, which allowed destructive heat to seep into the vehicle during re-entry.

Is this engineer-speak? You're damn right it is. But this engineering bursts from the Earth.... and sometimes, it sets us right back where we started. Much love to you, my Columbia Seven.