The National Safety Board has opened public hearings on a January midair collision between an Army Black Hawk helicopter and a commercial jet. The crash resulted in the deaths of all

The National Transportation Safety Board will wrap up its public testimony on Friday about the fatal midair crash between an Army helicopter and a commercial jet earlier this year

The board focused on air traffic control and heard it was common for pilots to ask to use visual separation — relying on eyesight — just as the Army Black Hawk’s pilot agreed to do the night of the crash.