PACEMAKER, BELFAST, 29/9/2010: The former US President Bill Clinton , with Deputy First Minister Martin McGuinness,after speaking at  the University of Ulster,Magee campus, in Londonderry,Wednesday 29th September 2010,Mr Clinton  arrived in Northern Ireland on a visit designed to support the peace process and promote economic growth.Mr Clinton is visiting Londonderry where 25,000 people turned out to see him on his first visit in 1995. He is expected to make a speech at the University of Ulster campus at Magee on how to build economic prosperity.PA:Paul Faith POOL PICTURE