Irishman to attempt to climb Mount Everest without supplementary oxygen

James McManus, from Roscrea, Co Tipperary, will set off on his gruelling trek early next month

An elite Irish adventurer is aiming to make history by becoming the first person from this country to climb Mount Everest without using supplementary oxygen.

James McManus, from Roscrea, Co Tipperary, will set off on his gruelling trek early next month, as he bids to do what was once thought impossible in the world of extreme mountaineering.