The Welsh Government, local authorities, the NHS and a range of other agencies worked with the UK Government and NATO to ensure a safe and memorable summit.
Gweithiodd Llywodraeth Cymru, awdurdodau lleol, y GIG ac ystod o asiantaethau eraill gyda Llywodraeth y DU a NATO i sicrhau uwchgynhadledd ddiogel a chofiadwy.