The potential charges relate to Cuba’s 1996 downing of humanitarian planes, US media outlets report. The United States is planning to indict former Cuban President Raul Castro as Washington raises the pressure on the island’s communist government. Several US media outlets reported on Thursday that the potential charges against the 94-year-old brother of Fidel Castro relate to a 1996 incident in which Cuba shot down planes flown by the anti-Castro humanitarian group Brothers to the Rescue. Recommended Stories list of 4 items list 1 of 4 Cuba crisis explained: Who holds power, and could Diaz-Canel be replaced?…