Elon Musk is offering to go through with his original proposal to buy Twitter for $44 billion. The Tesla CEO said in a regulatory filing Tuesday that he notified Twitter of plans to go through with the deal.

By Tom Krisher, Matt O'Brien, Randall Chase, Associated Press

Microsoft Corp made an unexpected bid to buy struggling Internet icon Yahoo Inc. for $44.6 billion in cash and stock late Thursday, raising a new effort to challenge the dominance of search-engine giant Google Inc.

By PBS News Hour

Texas power company TXU agreed to a buyout by private equity firms in the largest-ever private buyout. The acquiring companies also committed to adopting more environmentally friendly policies. NewsHour reports on the buyout and the business of thinking green.