Parts of a Learjet may have broken off midair before Florida crash that killed 9, investigators say

WEST PALM BEACH, Fla. (AP) — A business jet that crashed in South Florida with nine people aboard, including a family with two young children, likely started breaking apart before it slammed into the ground and erupted in a fireball, a federal investigator said Monday.Video recorded by passersby captured the Bahamas-bound Learjet's rapid nosedive Sunday afternoon before it exploded in Greenacres, about 7 miles (11 kilometers) southwest of West Palm Beach. Flames flickered around chunks of pavement lining the crater as shocked residents looked on in horror. Thick black smoke engulfed the crash site and little remained of the plane.The victims included 20-year-old co-pilot Nathalia Gadelha Filgueiras, as well as technology entrepreneur Adam Robinson, his wife, Helen Sharp, and their two young children, relatives said.Weather is a major focus of the investigationNational Transportation Safety Board member Tom Chapman said during a news conference Monday that investigators found evidence t