Warren Buffett in unusual position after 27 percent profit drop

As investors descend on Nebraska by the thousands to query the "Oracle of Omaha" this weekend, they'll likely bring more questions than he cares to answer. Berkshire Hathaway, the investing conglomerate headed by folksy billionaire Warren Buffett, on Friday revealed an ugly first-quarter profit drop of 27 percent, fueled by a loss from insurance underwriting....