WUSA 9News Now At 6pm April 24, 2012
carbon monoxide at concentrations well beyond deadly. >> we can all stand here today and think about what we would do or could have or should have. the reality is, these people were affected very quickly by a large quantity of carbon monoxide. >> word spread quickly, but for more than an hour, they had to wait for details. >> i don't know what happened. i just know that some people dead in my mom's house and i can't get inside. >> the cdc says these kinds of deaths are shockingly common. nearly 500 people every year die from carbon monoxide poisoning. and the fire chief says a couple...