Dewayne Johnson, a former school groundskeeper, regularly used Roundup and claims it gave him cancer.

Dewayne Johnson, a former school groundskeeper, regularly used Roundup and claims it gave him cancer.

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He's dying of cancer. Now, he's the first patient to go to trial to argue Roundup made him sick

On bad days, Dewayne Johnson is too crippled to speak. Lesions often cover as much as 80% of his body. Doctors have said they didn't expect him to live to see this day. But Monday marks a milestone: Johnson, 46, is the first of hundreds of cancer patients to see his case against agrochemical giant Monsanto go to trial.