John Oliver explains the crucial U.S. trucking industry, and why there isn't really a 'shortage of drivers'

"Our main story tonight concerns trucks," something loved by everybody from toddlers to reality TV producers, John Oliver said on Sunday's Late Week Tonight. "But trucks are not just a staple of reality TV -- they're a vital part of our economy, carrying 70 percent of the tonnage that moves around America. And the drivers involved know just how much this country relies on them." Not that they are treated as such, he said. "Trucking companies have been quick to claim they're suffering a shortage ...