Vice President Biden/Powered by Coal/The Orphanage

Lesley Stahl with Vice President Joe Biden as he allows this reporter to follow him around for three days. Just what does he do and how does his wife, Dr. Jill Biden, figure in? Also expect to see President Obama in this segment. Also tonight, Duke Energy CEO Jim Rogers who is building coal plants despite knowing the deadly byproduct of this cheap and abundant fuel. Scott Pelley reports on how clean coal technology may be the answer and how it can be done, but will it be done in time? And Bob Simon following up with the heartbreaking elephant orphanage in Kenya. Why are there even more orphaned elephants?