Airlines are concerned about very light jets, or VLJs, operating in the same airspace as larger commercial jetliners. Flying as high as jetliners, though at slower speeds, they "have the potential for really gumming up the system," an airline executive says. The FAA wants to prevent a worsening of flight delays that are at the highest percentage since the 2000 record year. "We feel we are equipped to handle this new infusion of very light jets," says Diane Spitaliere, an FAA spokeswoman.
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