Heavy fog moved in overnight in parts of San Diego County, it could mean complications at the airport, so you'll want to keep an eye out for delays if you're traveling this morning. This week's mass shooting at a Wisconsin school has a local connection. The 15 year old shooter at the center of it appears to have been connected to a 20 year old in Carlsbad. Customs and Border Protection have publicly identified the agent who died in a helicopter crash earlier this week. NBC7's Steven Luke has what you need to know to start your Thursday.

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