Could a strange substance found by an Ark-La-Texman be part of secretgovernment testing program?That's the question at the heart of a phenomenon called Chemtrails." "It seemed like some mornings it was just criss-crossing the whole sky.It was just like a giant checkerboard," described Bill Nichols. He snapped several photos of the strange clouds from his home in Stamps, in southwest Arkansas.Nichols said these unusual cloudsbegin as normal contrails from a jet engine.But unlike normal contrails, these do not fade away. Soon after a recent episode he saw particles in the air. "We'd see it drop to the ground in a haze," added Nichols.He then noticed the material collecting on the ground. "This is water and stuff thatI collected in bowls," saidNichols as he handed us a mason jar ... after driving down from Arkansas. KSLA News12 had the sample tested at a lab.The results:A high level of barium, 6.8parts per million, (ppm).That's more than three times the toxic level set by the Environmental Protection Agency, or EPA. We discovered during our investigation that barium is a hallmark of other chemtrail testing.This phenomenoneven attracted the attention ofa Los Angeles network affiliate, which aired a report entitled, "Toxic Sky?" There's already no shortage of unclassified weather modification programs by the government.But those who fear chemtrails could be secret biological and chemical testing on the public point to the 1977 U.S. Senate hearings which confirmed 239 populated areas had been contaminated with biological agents between 1949 and 1969.Later, the 1994 Rockefeller Report concluded hundreds of thousands of military personnel were also subjected to secret biological experiments over the last 60-years. But could secret testing be underway yet again?