An oil rig located about 200 miles west of the BP Deepwater Horizon site exploded today. The media has covered the explosion only cursorily, making brief mention of three points: (1) 13 workers on board the rig escaped safely; (2) The rig, owned by Houston-based Mariner Energy Company, was about 150 feet shy of the depth subject to the Obama Administration's six-month moratorium on deepwater drilling (which applies to wells located in 500-feet of water or deeper); and (3) Although the explosion has not yet resulted in an oil spill, the event no doubt strengthens environmentalist calls for an expanded ban on drilling.