sentences:  The Inspector General Act of 1978 prevents officials in the scrutinized agency from interfering with audits or investigations and requires the IG to keep the Secretary of Transportation and Congress informed of findings, although much of OIG's work is accomplished with the cooperation of officials whose programs are being reviewed.The OIG carries out its mission by issuing audit reports, evaluations, and management advisories with findings and recommendations to improve program delivery and performance.In fiscal year 2006, OIG issued 76 audit reports, which identified more than $893 million in financial recommendations.