it must have shocked you when d you found out that there wasn tt a carbon monoxide detector at the preschool. what every parent needs to know. and the top-secret j.f.k. assassination files. both a republican and a democratic president pushed off the release. is there something they don t want you to know? this is the cbs evening news with norah o donnell, reporting from the nation s capital. o donnell: good evening to our viewers in the west, and thank you for joining us on this wednesday night. we ll get to that breaking news about those guns found near the supreme court and the arrest in just a minute. but we want to begin overseas amid russia s failing invasion. the kremlin continues to target ukraine s infrastructure, including power plants and the nation s water supply, as the winter cold sets in. as russian troops suffer setbacks on the battlefield, president vladimir putin is gp g martial law on four regions martial law on four claimed by moscow. well, tonight, we