WASHINGTON - The attorney for an 82-year-old southeast Washington man has claimed the $144 million Powerball lottery jackpot for his client. David Wilmot, the attorney, said Monday he was accepting the money on behalf of Rockson LLC - a corporation created to protect the man's identity. The winning ticket in the April 8 drawing came from the Giant grocery store on Alabama Avenue in southeast D.C. The jackpot winner is a widower with 10 children and 47 grandchildren and great-grandchildren. Wilmot says the man is taking the lump-sum payment of $79.6 million. -snip-