 From ABC News. I'm Daria Albinger, the head of the Secret Service in the hot seat. Director Kimberly Cheadle being grilled over the assassination attempt on former President Trump at a rally earlier this month. Under intense questioning from both parties, the Secret Service director was direct on this point. This was clearly a failure. But Kimberly Cheadle was unable to explain how a killer was able to get on a nearby roof.