FILE - In this May 26, 2006, file photo Tornado chaser Tim Samaras shows the probes he uses when trying to collect data in Ames, Iowa. Jim Samaras said
FILE - In this May 26, 2006, file photo Tornado chaser Tim Samaras shows the probes he uses when trying to collect data in Ames, Iowa. Jim Samaras said Sunday, June 2, 2013, that his brother Tim Samaras was killed along with Timâ s son, Paul Samaras, and another chaser, Carl Young, on Friday, May 31, 2013 in Oklahoma City. The National Weather Serviceâ s Storm Prediction Center in Norman, Okla., said the men were involved in tornado research. (AP Photo/Charlie Neibergall, File) (CHARLIE NEIBERGALL)