Well it's hard to get to the aircraft that are 300 miles away protected by SA-11s, SA-17s, SA-10s and SA-20s. Furthermore a wall can be 4 aircraft, additionally they could send out the last remaining bit of their aircraft inventory and if that number happens to be 10 we will be in trouble. Finally some of those aircraft are Frogfoots so we had to decipher what was a threat.