MY wife and I were vacationing at Big Bend National Park in Texas.We arrived on the 22 of Sept.. It was are first time visiting the park.We hiked took in the beauty of the park and the sky was big and impressive.My wife and I spent a night in Marfa Tx.in hopes of seeing the Marfa Lights it was a rainy night and we were told not to bother.I guess I was all ready primed an hopeful.I had a pair of night vision binoculars my wife got me on-line.We hiked the first day then took it easy the next.We walked down to one of the observation points which overlooked what they call the window looking west.We were taking in the half moon night with clear visibility our heads tilted back on the observation bench we were sitting on my wife says hey look at that.I looked over to where she was looking and was speechless.I told her ugh stars don't move.We both watched this I think craft move across the sky north to south in about a minutes time.It did a what I would call a zig-zag before it went out of sight.20 minutes later it came back what appeared at an even higher altitude traveling south to north.I don't no if it was the same or possibly a second.We never saw two together.There was another observation point maybe 50 yards south of us they had some type of night vision film equip I heard them say out loud did you see that.I only wish I had talked to them.Well that's my story I felt compelled to tell you. I AM AN ARDENT BELIEVer.I I could think after-ward was stars that are light years away don't suddenly start moving.I kept thinking this thing must be huge.Really if you think about it there's no explanation.Thanks Mufon for listening. YOUR FRIEND Tim Clift.