text:  Live from NPR News in Washington, I'm Nora Rahm. President Biden met with his top Homeland Security and law enforcement officials today on last night's attack on a Trump rally in Pennsylvania. He says he's directed an independent review to determine exactly what happened. The FBI is leading this investigation, which is still in its early stages. We don't yet have any information about the motive of the shooter. We know who he is. I urge everyone, everyone, please,