Nightmare at Reagan National Airport: The TSA Strikes Back

Nightmare at National Airport — an update The TSA, rather than protecting its borders, would prefer to protects its ass. They have posted two videos and the official report of the incident.
Though Rashoman-like, the videos clarify nothing. The only question is whether Ms. Emmerson intentionally dumped her water (she clearly spilled it … intentionally?, “he informed the passenger that the child’s container was too big and would have to be poured out” … apparently she did so on the spot, which is probably inappropriate, though the guard did not provide a place to do so) and perhaps whether she tried to pull rank, though the videos have no sound, so this is quite unclear).
Still, it is clear the water was no threat, so why must it be disposed of.