 And, of course, everyone thinking of the attendee who was killed and the others who were seriously injured. Rachel Scott, thanks very much. Let's get more on the investigation now from our chief justice correspondent, Pierre Thomas. Pierre, FBI, Secret Service, ATF all involved. Where do things stand? Well, the FBI has taken the lead on what they're calling an attempted assassination. A detailed investigation is underway into the suspect's background, looking for any information about the suspect and whether he had any support. They also want to know if anyone knew about this before it happened.