Diving in for a great cause:Pic shows Keelin Moore as she gets a little help from her fellow swimmers at the start of the Triathlon.Over 60 O2 staff took part in a Fun Relay Triathlon Fundraiser for Headstrong in Dublin’s Docklands today. Starting at O2’s head office, O2 employees swam across the Liffey, cycled from there to The O2 and raced on foot back to the Samuel Beckett Bridge. O2 entered a major new three year partnership with Headstrong in September last. Together, Headstrong and O2 have devised the Think Big programme, which encourages young people to do projects in their community to promote positive mental health. More details can be found at www.o2thinkbig.ie.