Scouting jetliners for new attacks

In the article Scouting jetliners for new attacks from the Washington Post reports other examples, in addition to Annie Jacobsen's report (see below). It sounds like something is coming and it's coming via airplanes again. Some have said that it would be too stupid for terrorists to try to attack us by way of airplanes again because we're watching them too much. Apparently we're still not watching them enough because they're being probed.