A lawsuit against government contractor Blackwater Worldwide accuses its bodyguards of ignoring a direct order and abandoning their post shortly before taking part in a shooting in Baghdad that killed 17 Iraqi civilians. Filed this week in U.S. District Court in Washington, the complaint also accuses…Blackwater of failing to give drug tests to its guards in Baghdad…. A Blackwater spokeswoman said Tuesday its employees are banned from using steroids or other enhancement drugs but declined to comment on the other charges detailed in the 18-page lawsuit.