Malaysia Air 370 starting to sound like EgyptAir 990

All week, we have been hearing comparisons between Malaysia Air 370, which disappeared over the South China Sea last Friday night, and Pan Am 103, Air India 182 (which both had bombs on board) and Air France 447 (which exploded suddenly in mid-air, but was apparently not bombed). But it's now being reported that the plane may have flown for 'hours' well off course, something none of those