Rescue operation underway after explosion at Pennsylvania steel plant

[Music] Welcome to NBC News Daily where we start right now with breaking news coming out of Pennsylvania. A rescue operation is currently underway and that's after an explosion at a US steel fabricing plant near Pittsburgh. Emergency crews are on the scene trying to rescue workers who are reportedly trapped under the rubble.Our NBC affiliate in that area is reporting that one person has died and one local hospital says it is currently treating two patients. A second health network says it's treating seven p ...