George Knapp welcomed DNA expert, Melba Ketchum, for the entire 4-hour program, for a discussion on her Bigfoot research, as well as her testing or planned testing of samples from four giant and elongated skulls, and other giant remains. She addressed some of the controversies surrounding her previous DNA analysis of alleged Bigfoot hair and related samples, which yielded strange results that suggested some kind of human hybrid or mutation.
I used Photoshop to zoom in to the trails but have not altered the image in any way, shape or form other than that... I verify that I took these pictures with my iPhone in Mountain View CA. while driving on Shoreline Blvd. about 1/2 mile away from NASA Ames Research Center between 12:17-12:32pm on Tuesday September 23, 2013... The interesting thing about these pics, besides the unusual shape and size, is that they seemed to appear out of nowhere. No clouds in the sky, and no planes flying over to create these. Maybe someone has information about these, but I've never seen anything like this before.
Update: Check out this rotated and sheared photo from Andrew P. which indicates that the image was created by a skywriter.