Causes behind controller shortages

From the BBC World Service: The U.K. government has hailed a deal with the United States to keep tariffs on U.K. pharmaceutical shipments into the U.S. at zero, but the agreement comes with a cost. Then, Hong Kong's leader said serious problems in the city's construction industry, as well as oversight, were exposed in last week’s deadly high-rise fire. And, what's behind recruitment problems at Europe's air traffic control?