The weather is among the factors investigators will examine to determine the cause of a deadly crash in Akron Tuesday afternoon that killed all nine people on board.They also will be looking into reports that the private jet clipped power lines before crashing into an apartment building in the Ellet neighborhood, bursting into flames.“Our mission is to determine not only what happened but why it happened to prevent it from happening again,” Bella Dinh-Zarr, vice chair of the National Transportation Safety Board (NTSB) said Wednesday afternoon during a press conference.