Aristotle said "to give away money is an easy matter…and in any man's power. But to decide to whom to give it, and how large and when, for what purpose and how, is neither in every man's power nor an easy matter." Many Americans will be making those decisions in the final days of tax year 2007. Guest host Lawrence O'Donnell explores how we can target our charitable giving to be most effective. Also, a 350-pound tiger escaped from its enclosure and killed a man at the San Francisco Zoo yesterday. The same animal mauled a zookeeper last year. Are tigers safe enough for public zoos?