Family members who lost loved ones when a passenger jet and an Army Black Hawk helicopter collided midair in Washington, D.C., in January said in a letter that Army leadership is failing to take accountability and be transparent with those who are still mourning from the tragedy. The letter, posted publicly Wednesday, is addressed to Army Secretary Dan Driscoll and calls on the service to communicate directly with the families in the wake of the crash, as well as designate a point person to