Secretary Salazar works with volunteers from Youth Conservation Corps, Volunteers-in-the-Parks, Student Conservation Association and the Shenandoah National Park Association to remove exotic plants in the Shenandoah National Park on Monday, June 22, 2009.

Secretary Gates addresses volunteers, families and staff at Walter Reed Army Medical Center in Washington, DC where he spent time with wounded warriors on Monday, June 22, 2009.

Secretary Solis works with the Action YouthBuild program to help construct energy-efficient housing for low income individuals on Monday, June 22, 2009.

Secretary Locke prepares lunch at the Child Care Center during his visit to the La Mesita Homeless Shelter for Families in Mesa, Arizona on Monday, June 22, 2009.

Attorney General Holder speaks to youth at the Police Athletic League on Monday, June 22, 2009.

Chairwoman Nancy Sutley works with the Anacostia Watershed Society to plant native wetland species in Kingman Lake, a 35-acre wetlands marsh adjacent to the Anacostia River, on Monday, June 22, 2009.

Secretary Donovan joins volunteers from the St. Bernard Project and other local organizations to rebuild a New Orleans home that was destroyed in Hurricane Katrina on Monday, June 22, 2009.

Secretary Chu attends an energy efficiency event in partnership with League of Conservation Voters at the local YMCA where he helped assemble home energy efficiency kits and educational materials to help families lower their energy costs on Monday, June 22, 2009.

Ambassador Rice teaches middle and high school students about the situation in the Democratic Republic of the Congo (DRC) and about the emergency relief items needed by children in the DRC at the Harlem Children's Zone on Monday, June 22, 2009.

Deputy Secretary Lute teaches a citizenship class in New York City for immigrants preparing for the naturalization exam on Monday, June 22, 2009.

Secretary Napolitano visits the Orlando Citizen Corps Council to assemble Community Emergency Response Team kits in preparation for hurricane season at the Orlando Emergency Operations Center on Monday, June 22, 2009.

Secretary Shinseki assists volunteer drivers in transporting patients who are unable to drive to their medical appointments at VA Medical Centers on Monday, June 22, 2009.

Secretary Shinseki assists volunteer drivers in transporting patients who are unable to drive to their medical appointments at VA Medical Centers on Monday, June 22, 2009.

Secretary Sebelius reads to children as part of the "Reach Out and Read" program on Monday, June 22, 2009.

Administrator Fugate, a former volunteer firefighter, discusses the importance of volunteerism in the effort to fight fires and keep communities safe with firefighters, Community Emergency Response Team volunteers and members of Fire Corps in Denver on Monday, June 22, 2009.

Administrator Jackson helps clean up the Missouri and Kansas Rivers at Kaw Point Park, Kansas with the Missouri River Relief, Blue River Watershed Association, Missouri Stream Team and Friends of the Kaw, as well as local students on Monday, June 22, 2009.

Director Berry launches the "Feds Feed Families" summer food drive in the Fairfax, Virginia warehouse of "Food For Others" -- a recipient of food from the Capital Area Food Bank on Tuesday, June 23, 2009.

Acting Administrator Fulgham reads to children at the Esperanza Center, a health center that provides bilingual adult, pediatric and well-woman care in Baltimore, MD on Monday, June 22, 2009.

Secretary LaHood works on Habitat for Humanity’s Atlantic Avenue project, a 41 unit, multi-family, energy efficient building complex, in Brooklyn, New York on Monday, June 22, 2009.

Secretary Geithner serves lunch to the homeless and poor at So Others Might Eat (SOME) in Washington, DC on Thursday, June 25, 2009.