I wonder if astronauts' families can sue NASA or its contractors if they are negligent. Challenger was apparently done in by an O-ring that everybody knew would become brittle in near-freezing weather. Did the astronauts sue NASA or Morton-Thiokol? I was only 12 at the time of the Challenger disaster, so I don't recall.
This bit of morbid curiosity is brought to you by the news that the Shuttle Discovery will be launched in July.