"But if you look into the Mekong delta, for example in Vietnam, it has shown the 30-year cycle, but the phase and amplitude is going up and then going up like that."
VOA: standard.2009.12.21
After a down cycle you typically have a booming up-cycle due to pent up demand.
But smoother skies could be ahead, thanks to prospects for an extended civilian aerospace up-cycle and the little-noted possibility that Boeing could see an increase in foreign military sales.