Read MoreBrazilian authorities are searching for answers after a passenger plane crashed, killing all 61 people on board. Video shows the aircraft spiraling out of control and plunging to the ground. Authorities did discover the black box and hope it can help in their investigation.Brazilian authorities are searching for answers after a passenger plane crashed, killing all 61 people on board. Video shows the aircraft spiraling out of control and plunging to the ground. Authorities did discover the black box and hope it can help in their investigation.