people in a small louisiana community say that on some days it is literally sickening to be outside. the environmental protection agency says a local factory is releasing a chemical that s putting them at the highest risk in the country of developing cancer from air toxins. state regulators say the threat is not imminent but local people say cases of cancer are common. they re afraid and they re begging for help. victor blackwell has this cnn investigation. the air is so foul. the water s so messed up. and so many people are ill and dying of cancer. reporter: jar ral dean watkins is afreight. her family has lived in st. john the baptist parish, louisiana, for almost 40 years. she loves the people. recently she learned that she and more than 20,000 others who live nearby have the highest risk in the country of developing cancer from air toxins. the toxin in this case is