20/20 arranged for a leading research laboratory in Europe to conduct tests on five popular cell phone models to determine how much microwave radiation can be absorbed into the head of a cell phone user, depending on how the phones are held. While the cell phone industry has assured consumers for years that cellular phones are completely safe, the industry's former research director has now come forward to say this can no longer be presumed. "The industry had come out and said that there were thousands of studies that proved that wireless phones are safe, and the fact was that there were no studies that were directly relevant," says Dr. George Carlo. For the past six years, Carlo ran the cell phone industry's $25 million research program, which has studied the effects of microwave radiation from cell phones. "We've moved into an area where we now have some direct evidence of possible harm from cellular phones,"Carlo says in an interview with ABCNEWS' 20/20.