There's a silent killer affecting Minnesota firefighters and it doesn't involve burning buildings, flames or smoke, reports Marielle Mohs (1:53).
WCCO 4 News At 6 - December 27, 2019
There's a silent killer affecting Minnesota firefighters and it doesn't involve burning buildings, flames or smoke, reports Marielle Mohs (1:53).
WCCO 4 News At 6 - December 27, 2019