Just be VERY careful in following the signs to the various concourses.

If you approach what looks like 'security' doors or people guarding some doors ... STOP and do not proceed. As I recall the E concourse signs are a bit confusing and you can easily exit security without meaning to. [DO NOT go to the AC club at E as that is outside security]

If confused . as someone. The more TSA people you start to see .. the closer you are to leaving the secured area so be alert!