How did three Americans end up on trial for a coup attempt in the DRC?

More than 50 defendants are being tried for an attempted coup attack in the Democratic Republic of Congo. On May 19th, armed men dressed in military attire attacked the home of the economy minister, Vital Kamerhe and later moved on to President Felix Tshisekedi’s offices in Kinshasa. Former Congolese military officer, Christian Malanga, is still expected to face charges for leading this alleged coup, despite being killed by security forces during the attack. Also on trial are three US citizens, one of them is Christian Malanga's 21-year-old son, Marcel. Africa Daily's Alan Kasujja speaks to the BBC's reporter in the capital Kinshasa, Emery Makumeno.