Texas has been flexing its global oil muscles. : For the first time, the Lone Star state's biggest port district recently exported more crude oil than it imported, according to the Energy Department. It's a big achievement that highlights a surge in US oil exports, and that shows how the shale boom can make America less reliant on foreign oil. "It's a definite milestone. Nobody saw this coming 10 years ago," said Bob McNally, president of consulting firm Rapidan Energy Group and a former energy official under President George W. Bush. "It's an unambiguously good thing.