milestone. putin s war back fires. with fin land moving closer to joining nalto, could russia retaliate as the kremlin cuts off gas to europe. we re following a number of severe weather stories. dangerous storms in parts of the country. raging wildfires damage dozens of million dollar homes out west. and how a two decade drought is eroding one of america s most iconic reservoirs. news on the triple crown, the announcement from the underdog winner of the kentucky derby. and finally tonight, you have to see this video. the good sam tar samaritans who bring a woman suffering a medical emergency behind the wheel to safety. sth is the this is the cbs evening news with norah o donnell, reporting from the nation s capital. o donnell: good evening, and thank you so much for joining us on this thursday night. we want to begin with a crisis many say shouldn t be happening here in the united states of america. a struggle for parents to get baby formula. we learn today that th