Plane crash kills 3 families with young children on way to vacation

BUTTE, Montana (CNN) -- Three families with young children were heading to a ski vacation together when their plane crashed into a cemetery in Montana, loved ones of the victims said Monday.

Martha Guidoni says this photo was taken after she and her husband saw the plane "nosedive" in Butte, Montana.

Dr. Erin Jacobson and his family, shown here in a photo from November, were killed in the crash.

Federal investigators said that with no flight data recorder or cockpit voice recorder on the plane and no survivors, an invest