previously unreleased material. 1990s Live at the BBC, the first official release of unissued Beatles performances in seventeen years, appeared in 1994. That same year McCartney, Harrison and Starr collaborated on the Anthology project. Anthology was the culmination of work begun in 1970, when Apple Corps director Neil Aspinall, their former road manager and personal assistant, had started to gather material for a documentary with the working title The Long and Winding Road. Documenting their history in the band's own words, the Anthology project included the release of several unissued Beatles recordings. McCartney, Harrison and Starr also added new instrumental and vocal parts to songs recorded as demos by Lennon in the late 1970s. During 1995–96, the project yielded a television miniseries, an eight-volume video set, and three two-CD/three-LP box sets featuring artwork by Klaus Voormann. Two songs based on Lennon demos, "Free as a Bird" and "Real Love", were issued as new Beatles singles. The releases were commercially successful and the television series was viewed by an estimated 400 million people. In 1999, to coincide with the re-release of the 1968 film Yellow Submarine, an expanded soundtrack album, Yellow Submarine Songtrack, was issued. 2000s The Beatles' 1, a compilation album of the band's British and American number-one hits, was released on 13 November 2000. It became the fastest-selling album of all time, with 3.6 million sold in its first week and 13 million within a month. It topped albums charts in at least 28 countries. The compilation had sold 31 million copies globally by April 2009. Harrison died from metastatic lung cancer in November 2001. McCartney and Starr were among the musicians who performed at the Concert for George, organised by Eric Clapton and Harrison's widow, Olivia. The tribute event took place at the Royal Albert Hall on the first anniversary of Harrison's death. In 2003, Let It Be... Naked, a reconceived version of the Let It Be album, with McCartney supervising production, was released. One of the main differences from the Spector-produced version was the omission of the original string arrangements. It was a top-ten hit in both Britain and America. The US album configurations from 1964 to 1965 were released as box sets in 2004 and 2006; The Capitol Albums, Volume 1 and Volume 2 included both stereo and mono versions based on the mixes that were prepared for vinyl at the time of the music's original