 Mothers of the Disappeared  was performed again on the fourth leg of the Vertigo Tour , on 26 February 2006 in Santiago and 2 March in Buenos Aires . Although it was rehearsed by the full band , it was played only by Bono and the Edge in an arrangement similar to the one from the PopMart Tour . The Edge performed the song on a charango that Chilean President Ricardo Lagos had given to Bono earlier that day . It was played at three concerts on the third leg of the U2 360 ° Tour in place of " MLK " . One performance in Istanbul , Turkey , was dedicated to Fehmi Tosun , an ethnic Kurd who was kidnapped in October 1995 and subsequently disappeared . The abduction was witnessed by his wife and daughter ; no information regarding his disappearance have ever been released .