A friend's stepmother used to have a high position in the EU government. When she arrived in the US she was met at the plane by someone who brought her past the standard immigration lines (she still had to have her passport checked but it was a quick process in a private room with no lines, even if she wasn't coming on official business). Then my friend had to sign a waiver to waive Secret Service protection while she was here. When he dropped her at the airport on her way home, a United rep met her curbside and let her bypass TSA, going straight to the United Club (or whatever it was called then).