Yeah, in a military context most of the time, this is the procedure (for the most part). In this setting, where you have no clue the history or lineage of the item, it becomes a bit different. Also, I do not want people that have not been trained on handling (possible) explosives... well, handling (possible) explosives! TSOs are not trained in the proper handling of unknown explosive items, and I truly wish to keep it that way - because if I discover a grenade in a bag, especially with all the other clutter and electronics in the bag with it, I am not going to touch it. That job belongs to the TSSEs (TSA explosives experts) if they are available, the EOD if there are no TSSEs around.