So in the summer of 1923 they boarded the Highland Loch, which was calling in at the Canaries en route to Buenos Aires with its cargo of passengers and, apparently, chilled meat.
The tremendous force of that propulsion mustn't be allowed to shake the vehicle, its systems or its fragile cargo of passengers apart.
Two years later, less than five per cent of cargo on passenger planes was being screened.
However, only about 65 percent of cargo on passenger planes arriving in the United States from abroad is now subjected to some physical screening, and the percentage is far lower on all-cargo flights.
Homeland Security officials had a tough challenge in meeting the Congressional mandate, but in large part they succeeded: by August of this year, 100 percent of cargo on passenger flights within and from the United States was being physically screened.
The bill requires screening of all cargo on passenger planes within three years and sets a five-year goal of scanning all container ships for nuclear devices before they leave foreign ports.
Administration officials said they planned to phase in screening of all cargo on passenger planes, adding that they do not yet have the ability to do so.
According to the Airforwarders Association, a recent US mandate that requires screening of all cargo on passenger planes entering or flying within the US would carry an immediate cost of $700m£436m6m) and require 9,000 employees.
The 9/11 Commission warned that terrorists may try to place explosives in the cargo holds of passenger planes and urged that more be done to guard against such attacks.
Mr. Sheeler's readers may not have realized, for instance, that dead soldiers' coffins have been hidden in cardboard boxes (ostensibly to protect the coffins), toted by forklifts and stowed in the cargo holds of passenger planes.
