Relief wells may be used to stop oil gushing into the Gulf of Mexico . CNN hopes to have a well in place by May 2 . In 1979 , it took nearly 10 months to seal the world 's largest spill in Mexico 's Bay of Campeche . Drilling for the second well began on August .
Relief wells may be used to stop oil gushing into the Gulf of Mexico . CNN hopes to have a well in place by May 2 . Drilling for the second well began on August .