with a survivor as leaders meet. it started with sleepovers. o donnell: american innovation: the georgia college with a 99% employment rate for recent grads. so what s their secret? the consumer warning over a popular fisher-price rocker for babies and toddlers. what parents need to know. a big announcement from serena williams: after a year on the sidelines, what s next for the tennis superstar? and the u.s. army celebrate its 247th birthday. a look at the branch s past and future. 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 hot tuesday night. .and it s still, technically, spring. tonight, there s severe weather that is impacting virtually every corner of the nation. excessive heat watches and warnings are in effect in more than a dozen states and more than 170 million americans will see temperatures above 90 degrees. flood