At least seven people were killed and 19 others injured after a medical transport plane, carrying a child, her mother and four other people, crashed in Philadelphia Friday night near a busy mall, according to city officials. Everyone aboard the flight was killed in the crash and one person was killed on the ground, Philadelphia Mayor Cherelle Parker said at a press conference Saturday. The Learjet 55 crashed near the Roosevelt Mall in northeast Philadelphia around 6:30 p.m. after departing from Northeast Philadelphia Airport, according to authorities.