Alef Aeronautics Inc., a San Francisco Bay Area company ... nobody was under or near the flight path, the surrounding area ...

Nearly half of all Americans now live in places with unhealthy air, and the Bay Area metro is among the top 20 in poor air quality.

He began his role with CBS Bay ... Area standards with flights going to only 15 locations. For travelers like William Humphries, it's a convenient alternative to driving all the way to San Francisco.