in use for over two decades. In March 2013, "The Mission" was replaced with a theme by Adam Gubman for Non-Stop Music, which is based partly on the Mission theme. A lighter theme employing the NBC chimes is currently used to open the show's 7:30 and 8:30 a.m. half-hour segments, and is also used as a closing theme. Special editions Following the Space Shuttle Columbia disaster on February 1, 2003, the Sunday edition of Weekend Today aired a special edition on February 2, with the expanded introduction: The next edition on February 3 was also a special broadcast with Matt Lauer at Studio 1A in New York and Katie Couric at the Johnson Space Center in Houston. On April 6, 2003, the death of co-anchor David Bloom in Iraq (caused by a blood clot resulting from deepvein thrombosis) dominated that day's edition. Soledad O'Brien, Matt Lauer, and Katie Couric stationed in Washington DC, hosted a special edition of Today in remembrance of Bloom. When Pope John Paul II died on Saturday, April 2, 2005, Katie Couric and Matt Lauer anchored the weekend editions of Today. Lauer anchored from Vatican City with Campbell Brown offering reports by his side. On the day of the Pope's death, Couric anchored a special report on a Vatican statement updating the Pope's dire condition and Lauer reported for the special report anchored by Brian Williams, when the Pope was officially declared dead. Lauer returned to New York City as Couric traveled to Vatican City to co-anchor coverage of the Pope's funeral with Williams. On April 19, 2008, a special edition of Weekend Today featured Pope Benedict XVI's visit to the United States, billed as "The Pope Visits the USA." Lester Holt and Jenna Wolfe moved outside to Rockefeller Center to cover the first papal mass at St. Patrick's Cathedral in New York City. However, they moved back to Studio 1A at the 7:30 a.m. half-hour. On May 10, 2008, Weekend Today featured a special split-location edition covering the wedding of Jenna Bush at the ranch of President George H. W. Bush outside Crawford, Texas. Co-anchor Lester Holt remained at Studio 1A, while Amy Robach covered the wedding from Texas. On June 14, 2008, a special edition of Saturday Today, anchored by Matt Lauer and Tom Brokaw, discussed the death of NBC News Washington bureau chief and Meet the Press moderator Tim Russert. Andrea Mitchell, David