During the interviews, the pilots told investigators that the approach had been programmed into their flight management system, but that they first saw the airport beacon and the runway lights of M. Graham Clark Downtown Airport, located in Hollister, Mo., which they mistakenly identified as Branson Airport. They cited the bright runway lights at M. Graham Clark Downtown Airport and the fact that the runway was oriented in a similar direction. They also informed investigators that they flew a visual approach into what they believed to be Branson Airport and that they did not realize they were at the wrong airport until they had landed. They confirmed that they utilized heavy braking to bring the aircraft to a stop and then advised the Branson Airport tower that they had landed at the wrong airport.