 Yes. Right now, the investigation, frankly, is in its very nascent stages. Our sources are telling us at this time that this individual was not known to law enforcement. We do know what his name is. We know his general biographic information. But at this point, authorities have indicated there's no nexus to terrorism and no law enforcement background. At the same time, Margaret, it is worth noting that the intelligence community has warned for years about the threats posed by lone actors and small groups of individuals.