A sightseeing flight from Talkeetna, Alaska, on August 4, 2018, ended with a de Havilland DHC-2 Beaver operated by K2 Aviation crashing on Thunder Mountain in Denali National Park. The flight carried pilot Craig Layson and five passengers, including 46-year-old visitor Robert Sieniawski of Poland and three other Polish tourists, Janusz Intek, Kazimierz Miernik, and Maria Libacka. The aircraft struck a knife-edge ridge at about 11,000 feet and came to rest broken in half, partially in a crevasse on extremely steep terrain of rock, ice, and snow.

The pilot made two brief satellite calls reporting the crash and injuries, but contact was lost; poor weather delayed aerial detection until August 6 when rangers located the wreckage. Rangers later confirmed all five aboard perished and, because the site was too hazardous, officials decided recovery of the victims and aircraft was not feasible.

Did anyone have contact with Robert while he was visiting Talkeetna or know why he chose that tour?