Fast Facts

The Department of Defense has provided U.S. Customs and Border Protection with personnel and other support for at least 2 decades. DOD evaluates requests for assistance against 6 criteria, including cost and how providing support would affect military readiness.

We looked at 4 such requests for assistance that DOD approved. We found that DOD used unreliable cost estimates and didn't fully evaluate the effects of the requests on military readiness. Also, DOD didn't track all costs or give Congress timely information on the full costs it incurred for homeland security support, as it was mandated to do. Our 7 recommendations address these issues.

DOD Detection and Monitoring Support in San Diego, California

Image of Border Patrol vehicle

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Highlights

What GAO Found

Since April 2018, the Department of Homeland Security (DHS) has submitted 33 requests for assistance (RFA) to the Department of Defense (DOD) for support to U.S. Customs and Border Protection's (CBP) mission at the southwest border. DOD established six criteria for evaluating RFAs, which it documents in decision packages. When reviewing four selected decision packages, GAO found that DOD fully evaluated four of these six criteria. GAO found that DOD developed rough cost estimates that were not reliable. In addition, DOD did not fully evaluate the effect on military readiness of providing support at the time the Secretary of Defense considered DHS's requests. Without reliable cost estimates and a timely readiness analysis, DOD is limited in its ability to evaluate the effect of supporting DHS on its budget and readiness rebuilding efforts.

DOD's Detection and Monitoring Support Mission

DOD's Detection and Monitoring Support Mission

DOD has not provided Congress with timely information on the full costs it has incurred since 2018 in supporting DHS. Specifically, during this review, DOD did not submit its statutory report to Congress for fiscal year 2019, which was due March 31, 2020. Additionally, GAO found that DOD's internal tracking of obligations excludes potentially significant costs of border support activities, such as installation support costs and the cost of benefits retroactively provided to members of the National Guard. By providing more timely and complete information to Congress, DOD would enhance Congress's ability to conduct oversight and make funding decisions for DOD and DHS.

DOD and DHS employed several key interagency collaboration practices for DOD's support on the southwest border, but they have not agreed on a common outcome for DOD's support in fiscal year 2021 and beyond. DHS anticipates needing at least the current amount of DOD support for the next 3 to 5 years, possibly more, and officials stated that the desired outcome is for DOD to provide the capabilities requested in the RFAs. This differs from DOD's desired outcome, which is to provide temporary assistance until DHS can independently execute its border security mission. Defining and articulating a common outcome for DOD's support could enable DOD to more effectively plan for the resources it will need to support DHS and enable DHS to plan to manage its border security mission more effectively with its own assets.

This is a public version of a sensitive report that GAO issued in February 2021. Information on force protection that DOD deemed sensitive has been omitted.

Why GAO Did This Study

For decades, the U.S. southwest border has been vulnerable to cross-border illegal activity such as illegal entries, smuggling of drugs and contraband, and terrorist activities. Since 2002, DOD has supported DHS's mission to secure the nation's borders and episodically supported its efforts to manage surges in foreign nationals without valid travel documents who are seeking entry—most recently since April 2018, when the President directed the Secretary of Defense to support DHS in securing the southwest border.

GAO was asked to examine this support. This report assesses the extent to which (1) DOD has evaluated DHS's RFAs, (2) DOD has reported to Congress the full costs of its support, and (3) DOD and DHS have collaborated on border security operations. GAO reviewed RFAs that DHS submitted to DOD between April 2018 and March 2020 and a non-generalizable sample of decision packages that DOD prepared in response, and conducted four site visits to border locations where military personnel were stationed.

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Recommendations

GAO makes seven recommendations, five to DOD to improve its analysis and reporting of cost and unit-level readiness impacts of supporting southwest border operations and one each to DOD and DHS to define a common outcome for DOD's future support. DOD agreed with one recommendation and disagreed with five. GAO continues to believe the recommendations are warranted as discussed in the report. DHS agreed with the recommendation to it.

Recommendations for Executive Action

Agency Affected Recommendation Status
Department of Defense 1. The Secretary of Defense should ensure that the Under Secretary of Defense (Comptroller) follows GAO best practices for completing well-documented cost estimates when assessing DHS's RFAs related to the southwest border by documenting its estimating methods for future RFAs. (Recommendation 1)
Open
When we confirm what actions the agency has taken in response to this recommendation, we will provide updated information.
Department of Defense 2. The Secretary of Defense should ensure that the Under Secretary of Defense (Comptroller) follows GAO best practices for credible estimates when assessing DHS's RFAs related to the southwest border by completing a robust sensitivity analysis of key cost drivers, a risk and uncertainty analysis, and cross checks for future RFAs. (Recommendation 2)
Open
When we confirm what actions the agency has taken in response to this recommendation, we will provide updated information.
Department of Defense 3. The Secretary of Defense should ensure that the Chairman of the Joint Chiefs of Staff, in collaboration with the Secretaries of the Military Departments, identifies units likely to be sourced to support CBP on the southwest border and the potential unit-level readiness impacts of assigning those units prior to the Secretary responding to DHS's RFAs, when conditions permit. (Recommendation 3)
Open
When we confirm what actions the agency has taken in response to this recommendation, we will provide updated information.
Department of Defense 4. The Secretary of Defense should ensure that the Under Secretary of Defense for Policy, in coordination with the Under Secretary of Defense (Comptroller), provides the Section 1014 Reports to the cognizant congressional committees on time. (Recommendation 4)
Open
When we confirm what actions the agency has taken in response to this recommendation, we will provide updated information.
Department of Defense 5. The Secretary of Defense should ensure that the Under Secretary of Defense (Comptroller) clarifies guidance to ensure that the military services and the National Guard Bureau track all costs associated with DOD support to CBP's border security mission, including costs associated with installation support, oversight of border bar construction projects, and National Guard personnel benefits and include those costs in any future Section 1014 Reports. (Recommendation 5)
Open
When we confirm what actions the agency has taken in response to this recommendation, we will provide updated information.
Department of Homeland Security 6. The Secretary of Homeland Security, together with the Secretary of Defense, should define a common outcome for DOD's support to DHS, consistent with best practices for interagency collaboration, and articulate how that support will enable DHS to achieve its southwest border security mission in fiscal year 2021 and beyond. (Recommendation 6)
Open
When we confirm what actions the agency has taken in response to this recommendation, we will provide updated information.
Department of Defense 7. The Secretary of Defense, together with the Secretary of Homeland Security, should define a common outcome for DOD's support to DHS, consistent with best practices for interagency collaboration, and articulate how that support will enable DHS to achieve its southwest border security mission in fiscal year 2021 and beyond. (Recommendation 7)
Open
When we confirm what actions the agency has taken in response to this recommendation, we will provide updated information.

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