Five years ago: Investigators with the president's oil spill commission said tests performed before the deadly blowout of BP's oil well in the Gulf of Mexico should have raised doubts about the cement used to seal the well, but that the company and its cementing contractor used it anyway. (The cement mix's failure to prevent oil and gas from entering the well has been cited by BP and others as one of the causes of the accident.) Caroline Wozniacki wrapped up the year-end No. 1 ranking after rallying to beat Francesca Schiavone 3-6, 6-1, 6-1 at the WTA Championships in Doha, Qatar. Stage and screen actor James MacArthur, who played "Danno" in the original version of television's "Hawaii Five-0," died in Jacksonville, Florida, at age 72.