The three storm chasers killed while tracking a massive twister in Oklahoma died "doing what they loved," Tim Samaras' brother said on his Facebook page Sunday night. A jarring image of the flattened car that they were riding in sheds light on their final moments. Authorities say the truck was "crushed like a tin can...smashed to bits." Close friends of the three -- Tim Samaras, 55, his son Paul Samaras, 24, and Carl Young, 54 -- are blaming the fatal incident on the sudden, deadly left-hand turn made by the twister. Samaras, who had received 18 grants from the National Geographic, founded TWISTEX, a project dedicated to getting more scientific information about twisters.

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