BP Chief Executive Tony Hayward testifies before the U.S. Congress, apologizing for the spill but avoiding answering most questions and stating that he was unaware of the risks at the Deepwater Horizon rig that exploded in April causing the oil spill. [http:--www.theaustralian.com.au-news-breaking-news-bp-ceo-grilled-by-us-congress-story-fn3dxity-1225881174531 ("The Australian")] [http:--www.cbsnews.com-8301-503544_162-20008103-503544.html (CBS)] [http:--www.miamiherald.com-2010-06-17-1686441-an-angry-congress-lambasts-bp.html (Miami Herald)]date=August 2019