The U.S. government has failed to inspect nearly all of the chemical facilities it considers to be highly vulnerable to terrorist attacks, according to a report commissioned by Sen. Tom Coburn, R-Okla. The report found that 3,972 of the 4,011 high-risk chemical facilities had not been checked for security compliance by DHS as of June 30. DHS spokesman S.Y. Lee said the department has made progress on monitoring and has approved security plans for 750 plants in the past two years. Meanwhile, long-term reauthorization of the Chemical Facility Anti-Terrorism Standards program could help the agency and the industry move forward, DHS officials have said.