For the next 5 days there will be 5 times the mastery in Mexico. The timing for this isn't a good sign. Normally the mastery events before a new location is released are in the previous destination which would be Los Angeles. I hope Zynga isn't planning on shutting down Mexico like they did with South Africa. That would be the end of stamina jobs unless Japan ends up having a few. Cutting Winds will randomly drop while doing jobs in Mexico but they aren't very helpful.