Notebook: April memories

Katie Couric says her final goodbye on her last day as anchor of the CBS Evening News. Couric shares some of her favorite anchor sign-offs and gives a sign-off of her own.

Katie Couric discusses tomorrow - her last day as anchor for the CBS Evening News - and gives what she calls "part one" of her parting thoughts.

Katie Couric discusses President Obama's push to advance immigration reform and the obstacles that stand his way. Couric mentions that while the president touts its economic benefit, critics say his push is a ploy to win Hispanic votes.

Katie Couric discusses the specialized training of the Navy SEALs and thanks them for braving the critical mission which killed the world's top terrorist - Osama Bin Laden.

New York became the first state to require all motor vehicles to have a license plate 110 years ago to this day. Katie Couric comments on the history of license plates.

Katie Couric discusses some of the most difficult stories she has ever had to cover wand explains how April can be the cruelest month.