all public schools across los angeles, and not just the city, but the county are closed today after this district received an unspecified but concerning electronic threat. the superintendent says that the threat involved backpacks and other packages, and l.a. is the second largest school system in the country, and has more than 660,000 student, and police in the largest district in new york, they said they received an e-mail with the same threat, but they dismissed it as a hoax. there is a press conference now out of the school district. let's listen in. >> i want to welcome you. i want you to know that i made the decision to close the school s. that was after talking to the chief deputy superintendent. the chief of police of school police. and after they reviewed with me the information that had been