Tornado Clusters Roar Through Oklahoma Homes; Wildfires Torch Dozens of Homes in Georgia; Top Trump Envoys Head to Pakistan for More Peace Talks With Iran; Trump Administration Now Permits Death By Firing Squad For Federal Cases; One of Two Missing Florida Doctoral Students Found Dead, Roommate in Custody, Police Say; California Mom Charged After Teen Son Critically Injures Vietnam Vet; How a Girl Born Without Most of Her Arm Was Inspired By a Denver Soccer Player Just Like Her, CBS