OMAHA, Neb. (AP) – Billionaire Warren Buffett is celebrating his 81st birthday and fifth wedding anniversary. The two occasions both fall on Tuesday because Buffett married his longtime companion, Astrid Menks, on his 76th birthday. Buffett will likely spend the day at Berkshire Hathaway’s offices because the chairman and CEO rarely changes his routine. Buffett’s age makes Berkshire shareholders worry about who will lead the company when he’s gone, but Buffett says the company has a detailed succession plan in place. Buffett says he feels great and has no plans to retire, and he continues making deals. Just last week, Buffett announced a $5 billion investment in Bank of America. Berkshire will earn 6 percent interest on that investment and receive 700 million warrants to buy stock in the bank at $7.14 per share.