UFOB INDEX CARD AISS-Ul'OB-412-55 2. LOC.A flON CONCLUSIONS 11 December 1955 Colorado Springs, and Denver, 0 Was Balloon Probably Balloon DATETIME GROUP } 4. TYPE OF OBSERVATION Possibly Balloon I Ground-Visual 0 Was Air~raft (u/i-:J JtJ c 0 Ground-Radar Probably Ai r~raf t 11/l~OZ Dec 55 0 Ai,..Visuol 0 Possibly Aircraft 0 Air-Intercept Rodor Wos Astronomi coV"'lt e:Ta,'( 0 Probably Ast;onomi~al Military and Civjlian 0 Possibly Astronomical LENGTH OF OBSERVATION e. NUMBER OF OBJECTS COURSE, Other Insufficient Doto for Evaluation 3-5 Seconds 10. BRIEF icMMARY OF SIGHTING Three observers, all description. (1), object, green wi~h an orange traU, Def'1nitel7 identified as meteor by USAl much brighter t ;,an jet e:xhau.b Captain (PUot). AlSOP Form 5 (15 Oct 54)