51.   Former Enron chief financial officer Andrew Fastow refused to answer questions from lawmakers investigating the collapse of the energy giant.

52.   The rise affected the most liquid Russian stocks which are globally traded, such as energy giants LUKoil, Mosenergo and Unified Energy Systems.

53.   Kenneth Lay, the embattled chairman and chief executive officer of fallen energy giant, announced his resignation Wednesday.

54.   Problems were mounting Tuesday for Enron, the energy giant whose abrupt slide into bankruptcy has sparked a series of investigations.

55.   The Chicago-based accounting firm has been charged with obstruction of justice for shredding documents and destroying e-mails connected to the failed energy giant.

56.   The Chicago-headquartered firm has been charged with obstruction of justice for shredding documents and destroying e-mails connected to the failed energy giant.

57.   The energy giant filed for bankruptcy last month, the largest in US history.