Original: Corroborating other theories , his conclusion is that a Sukhoi jet ( which he identifies as a Su-15 ` Flagon ' ) was flying below its minimum allowed altitude , and '' without realizing it because of the terrible weather conditions , he passed within 10 or 20 meters of Yuri and Seregin 's plane while breaking the sound barrier . ''
Simplified: Approving other theorie , his thoughts are that a Sukhoi jet ) was flying below its minimum allowed altitude , and '' without realizing it because of the terrible weather conditions , he passed within 10 or 20 meters of Yuri and Seregin 's plane while breaking the sound barrier . ''