sentences:  Each one showcased in the issue for their contributions to the humanitarian relief in Africa.In an article in Bloomberg Markets in March 2007, journalists Richard Tomlinson and Fergal O'Brien noted that Bono used his band's 2006 Vertigo world tour to promote his ONE Campaign while at the same time "U2 was racking up $389 million in gross ticket receipts, making Vertigo the second-most lucrative tour of all time, according to Billboard magazine ... Revenue from the Vertigo tour is funnelled through companies that are mostly registered in Ireland and structured to minimise taxes.