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The nationwide worker shortage's effects can be seen as local businesses prepare for the 20th anniversary of 9/11.
Some of the spending is classified, while there's also been a lack of transparency.
Many have been diagnosed with cancer. The exposure to toxins from the pulverized buildings "has a really, really long tail," a doctor says.
The Flight 93 memorial has attracted visitors to the area, but locals there say there hasn't been a massive boost.
This weekend marks 20 years since the Sept. 11 terrorist attacks. We check in on Pennsylvania, where Flight 93 crashed in a field. Marketplace's Nova Safo joins us from Pittsburgh.
The developer of the World Trade Center hopes to recover billions of dollars from United, American, Boeing and other aviation companies to pay for WTC's destruction in the 9/11 terrorist attacks.
Because of an insurance dispute, after all these years, a jury may take on the question of whether airlines' poor security was responsible for the World Trade Center disaster.