- United States Postal Service: Strategy Needed to Address Aging Delivery Fleet, GAO-11-671T, May 17, 2011
- United States Postal Service: Strategy Needed to Address Aging Delivery Fleet, GAO-11-386, May 05, 2011
- Visa Waiver Program: DHS Has Implemented the Electronic System for Travel Authorization, but Further Steps Needed to Address Potential Program Risks, GAO-11-335, May 05, 2011
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