Click play on the video above to watch President Obama's address, which is due to begin at 6.15pm UK time.
More top news
Schools and nurseries are being called on to help check children have brushed their teeth.
Changes in gait could prove to be an early sign of Parkinson's disease, according to a new study.
Tomorrow a new band of rain will move across mainly western Scotland, further south it will stay bright with some sunny spells.