Just for argument sake...
What if OBL was running out of resourse to attack the UK, US, etc...Knowing that the US is waiting for an attack after his latest video, would the video do more harm since everyone would be anticipateing an attack that may never happen. Since the 2/10 times nothing happened, we could also assumbe that OBL is loosing resourse to do his dredfull deeds. At this point in the game OBL's video may be all he has to attack the US at this time.
2/10 times nothing happened,
Wonder what the dates are on the 2 times binny didn,t attack?