Most industrialized nations have stopped executing criminals. But the death penalty is still legal in many parts of the United States.Public opinion studies show that support for the death penalty among Americans is lower than it once was.But it remains strong -- at around 60 percent.However, the same surveys show that even death penalty supporters have concerns about the justice system and the way executions are carried out.When people are put to death in the prison in Huntsville, Texas, death penalty opponents often demonstrate outside the building."Today, around the state, people are gathered to say 'No!' to the death penalty."Texas carries out more executions than any other state.Last year, it put 16 people to death. Surveys show most people in Texas support the death penalty.Dudley Sharp is among those supporters. He says executions ensure that killers do not kill again, and persuade others not to kill.