"The coal baron who runs the West Virginia mine that last month saw the deadliest U.S. mine accident in 40 years came unbowed to Capitol Hill today, insisting that his company 'does not place profits over safety.'"

"The Environmental Protection Agency has directed oil giant BP to use a less toxic form of chemical dispersants to break up the oil spill in the Gulf of Mexico."

A CBS News crew captured on video orders from BP contractors and US Coast Guard officials to stop filming environmental damage from the BP-owned oil fouling Louisiana beaches and coastal wetlands. The Coast Guard denied that it or BP has rules prohibiting coverage.

"Today the U.S. Environmental Protection Agency (EPA) and the Department of Homeland Security (DHS) took steps to increase the transparency of the response to BP's catastrophic oil spill in the Gulf of Mexico. The oil company's actions have been criticized for failing to disclose or monitor important information about the spill, including the quantity of oil erupting into the Gulf, the potential health impacts of the oil and the chemicals used to disperse it, and water and air quality information."

The vast deposits of deepwater methane hydrates may have been a major factor in the Deepwater Horizon blowout and explosion. Methane hydrates expand 164 times in volume when destablilized by heat and reduction in pressure. Such conditions may have existed the night of the explosion, causing a quickly expanding bubble of methane gas to shoot up the drill column before exploding on the platform on the ocean's surface.

"BP, the company in charge of the rig that exploded last month in the Gulf of Mexico, hasn't publicly divulged the results of tests on the extent of workers' exposure to evaporating oil or from the burning of crude over the gulf, even though researchers say that data is crucial in determining whether the conditions are safe. Moreover, the company isn't monitoring the extent of the spill and only reluctantly released videos of the spill site that could give scientists a clue to the amount of the oil in gulf."

"A proposal to drill for oil in the Arctic Ocean as early as this summer received initial permits from the Minerals Management Service office in Alaska at the same time federal auditors were questioning the office about its environmental review process."

A blanket of thick oil smothered Louisiana's life-giving wetlands as the BP oil spill finally moved ashore.

"The Minerals Management Service did not adequately regulate safety devices and procedures for offshore drilling before the massive Gulf of Mexico disaster, Interior Secretary Ken Salazar said [Tuesday]."

"Federal authorities on Tuesday expanded the no fishing zone associated with the BP oil spill to encompass 19% of the Gulf of Mexico."