An independent presidential commission has been set up to probe the huge oil spill from a wrecked BP-leased rig in the Gulf of Mexico, US President Barack Obama said Saturday. The main task of the bipartisan body, formed by an executive order, is to provide recommendations on how the oil industry can prevent -- and mitigate the impact of -- any future spills that result from offshore drilling. “Now, this catastrophe is unprecedented in its nature, and it presents a host of new challenges we are working to address,” Obama said in his weekly radio address as he announced the formation of the commission. “But the question is what lessons we can learn from this disaster to make sure it never happens again.” Two-term Florida governor and former senator Bob Graham, a Democrat, and former administrator of the Environmental Protection Agency William Reilly, a Republican, will serve as co-chairmen of the seven-member body, Obama said. Obama said he will appoint the remaining five members of the panel in coming days. It will include scientists, engineers, and environmental advocates, but no sitting government employees or elected officials.