Texas and Tennessee are both preparing to execute their oldest prisoners on death row today. In Texas, 78-year-old Carl Buntion is scheduled to be killed just a week after he had to be rushed to a hospital due to chest pains. Longtime death penalty critic Sister Helen Prejean has called on Texas to halt the execution. In a tweet, she wrote, “Carl can barely walk and has been diagnosed with vertigo, arthritis, and other chronic illnesses. What does this execution have to do with public safety?” Meanwhile, the state of Tennessee is scheduled to execute 72-year-old Oscar Franklin Smith today.