President Obama in Russia; Alistair Horne; Remembering Michael

Martha Raddatz from ABC News and Michael Mandelbaum from Johns Hopkins University examine President Obama's visit to Russia. Historian and author Alistair Horne describes his book, "Kissinger: 1973, The Crucial Year," and historical importance of Henry Kissinger. A look at the memorial service at the Staples Center in Los Angeles,, where various friends and artists pay tribute to entertainer Michael Jackson.