 pennsylvania campaign rally we need to be more concerned and more diligent than ever in ensuring that our two conventions and the rest of this presidential campaign comes off safely and securely delaware democratic senator chris coons on nbc's meet the press the 20 year old gunman thomas matthew crooks of bethel park pa was shot and killed by the secret service one rally go goer was killed two others critically hurt and there's more eyewitness accounts as well you get a