20 experienced freefallers could train another 100 experienced freefall jumpers. The knowledge can not be kept in the USA and in the final analysis this is knowledge we are talking about. The only real response is an armed citizenry. Twenty jumpers can not take over an SSB(N) with a fully armed and trained crew aboard. Nor can five or six suicide commandoes take over a school full of children with a fully armed faculty and staff. If one does not trust teachers with firearms how can one entruct one's children to them?
In country one slept with a sidearm because of the possibility of sappers inside the wire. Unfortunately, we know we have the enemy inside the wire here in the USA so we as a nation had best start realizing it.
Stay well - Stay safe - Stay armed - Yorktown
Judging from some of the tiny minds on this thread, we will have to lose a million Americans before everyone wakes up.