The reason that the terrorists hide amongst civilians is threefold: 1) they know we're (supposedly) reluctant to target civilians; 2) they want to hide their identity from us, and from everyone else; and 3) they want to intimidate their innocent countrymen (Don't rat us out or we'll kill you and your family).
4) They are the civilians
how many Terabytes does $1.5 billion buy?
If they use EMC gear, about 3
I know, because I put it there!
Australia bends over backwards for US, as they saved us from Japan in WWII, and we're hoping they will save us from China in WWIII.
Actually, I think we bend over forwards for the US
How does the artificial horizon stay calibrated during cruise? Your real attitude changes as you follow the curvature of the Earth, so you must use the real horizon from time to time to recalibrate the gyros. Same as with a DG.
Quite frankly, I don't know - I only fly behind steam gauges, and only day VFR, however the 'attitude' won't change, but your 'altitude' will. Even with a 'fixed' or uncorrected articfical horizon, you're only going to (logically) climb, as the earth falls away underneath you.
I would imagine that the avionics in an Airbus are pretty damn smart, and would get GPS position fixes and recalibrate the artificial horizon. In the case of flight 447, calibration of the artificial horizon would be of secondary or tertiary corcern - the emergency (the storm and frozen pitot tubes) would have been over quickly (assume a 50 mile storm system at 300 knots means it's 10 minutes before you're out of the storm).
Having said that, I wasn't suddenly thrown into a very high stress situation, with multiple alarms sounding, and the strange aircraft attitudes that are almost certain to occur when you fly into a powerful storm, so as mentioned earlier, it's easy for me to sit here at home to say that!. Aviation has the possibility of getting very exciting very quickly, and I can't help but think that, maybe, there were too many warnings presented to the pilots of flight 447, which distracted them from the task of flying the plane, which after all, is the primary purpose of the pilot.