Guys like Dustin Moskovitz, who was there at the beginning, have dumped material amounts of Facebook stock after lock-ups expired while newer employees, like David Spillane, have sold a big percentage of their Facebook holdings.
Some of Lock's routine-based material is the best around, but the overall performance seemed to try to cover a variety of areas - linking in with the Wikipedia-esque tour title "Lockipedia" - some are successful and others not so.
And as a consequence of extraordinary cooperation between our three countries that actually predates my administration, but was accelerated as a consequence of this Nuclear Security Summit, we've been able to effectively lock down and secure all this vulnerable material.
As with any vaccine, the aim is to prompt the immune system to recognise this outer shell and destroy the pathogen before it has time to lock onto cells and infect them with its genetic material.