Check out this "freeze" drill done at PHX airport by the TSA:
I can't tell you what this is about other than a group of government employees flexing non-existent power. If you want to fly, you must submit to a search. After you leave the security check point, you are covered under the 4th Amendment again. What does that mean? It means that the TSA does NOT have the right to detain you without due process or without Probable Cause.
If you are confronted with this absurdity, simply ask the question "Am I being detained?" If the answer is "NO" keep on going. They do NOT have the right to detain you, so don't let them. They don't have the right to check your drink in the gate. Don't let them. They only have the power that we give them, and if you let them... They will abuse it.
BTW, this is a section of the Government directly under the control of the Executive Branch. They are under Homeland Security, which is a cabinet level department. So, yes President Obama is directly responsible for these unlawful detentions. Why no questions about them????