So the data is delayed by 5-minutes. The issue isn't that terrorists are going to update their missile seeker systems automatically with this data. This data allows the terrorists to sort out the flights during their most changeable and most vulnerable stage: stacking at the airport, assignment to runway, and final approach. I've visited the service and it is indeed sensitive information. It allows the terrorists to position to the correct runway (that info is NOT available anywhere else) and wait for the inbound flight with a resolution of 5-minutes. This is dangerous for El Al, period. All the wonks who talk about 30,000 ft. being out of range just haven't given it a moment's thought. It's 4000 ft. on approach over residential areas (where a pickup truck in an alley is not unheard of) that is the danger. Whatever government agency is outsourcing the track data must be halted.
Saudi king to meet with Obama on Friday amid Gulf concerns over Iran deal (Reuters)
from the article: Web service that tracks flights could assist terrorists