A discussion of the Rosetta, the first spacecraft to successfully orbit a comet, with Rachel Feltman of the Washington Post, Dr. Michelle Thaller of NASA and Daniela Hernandez of the Wall Street Journal. A conversation with Mark Phillips, senior foreign correspondent for CBS News, on his decades of award-winning reporting. The second part of a conversation with Reid Hoffman, the co-founder of LinkedIn and a prominent Silicon Valley investor. On the 25th anniversary of the first episode of "Charlie Rose," Charlie considers our history and mission.