A screener is standing in front of the WTMD before anyone goes through - so what did this woman do, knock him/her to the ground and keep going? Did someone say 'excuse me, please come back here as you set off the alarm'? Or did the screener just stare into space while she walked past him/her?

If the screener was there and missed the alarm or let this woman walk away, and terminal was dumped because of it, then they should be terminated. Simple as that.

If I was the CEO of the airline whose schedule was disrupted because of delays caused by this mess, then I would be calling for someone's head - the screener and the supervisor at the very least.