[nicmarlo]

One wonders if a plane's computer software could be compromised

Now THAT'S a possibility....and has everything to do with the PLANE....and allowing some sort of remote-control....

[tmp02]

If this was a "definite threat", and there are supposed to be multiple attacks at the same time, then there are other planes out there that are either being searched or have gotten through security. A flight from Heathrow is about 8 hours...what time what this flight to take off...what time was it supposed to have landed in the States...will this be the landing time correspond to other flights that are currently on their way?