I think it's a frivilous suit. The airlines did have security checkpoints and met federal regulations.
The true fault lies in the nuetered intelligence comunity that happened under Bill Clinton. Clinton nuetered the intel comunity with great regulations like " no inteligence officer will have contact with anyone of questionable characrter" Well who sells out their countries and does bad things except people of questionable character. Telling the intel folks you can't meet with them kills any possibility of being in the know.
Now the intel community has grown is out there and active.
It's all George Bush's fault and there is always the Israeli's to blame.