Gulf oil spill: Louisiana National Guard

  • Fragile wetlands can be seen from a Black Hawk helicopter during a mission with the Louisiana National Guard to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • Subcontractors aid the Louisiana National Guard to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • Sandbags extending the barrier islands block the flow of water as the tide goes out during a mission to block the flow of oil into the fragile wetlands of the state on May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • A Black Hawk helicopter lands near a pile of sandbags during a mission with the Louisiana National Guard to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • Members of the Louisiana National Guard take a break from their mission to block the flow of oil into the fragile wetlands of the state using sandbags to extend the barrier islands on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • Members of the Louisiana National Guard check the sandbag booms off of the coast during a mission to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • Members of the Louisiana National Guard check the sandbag booms off of the coast during a mission to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • Sandbags extending the barrier islands block the flow of water as the tide goes out during a mission to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • A member of the Louisiana National Guard check the sandbag booms off of the coast during a mission to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • A Black Hawk helicopter drops sandbags to extend the barrier islands during a mission with the Louisiana National Guard to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • A Black Hawk pilot from the Louisiana National Guard logs information during a mission to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • Fragile wetlands can be seen from a Black Hawk helicopter during a mission with the Louisiana National Guard to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • A member of the Louisiana National Guard looks out of the Black Hawk helicopter during a mission to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD

  • A shrimp boat in fragile wetlands can be seen from a Black Hawk helicopter during a mission with the Louisiana National Guard to block the flow of oil into the fragile wetlands of the state on Tuesday, May 25, 2010. STEVEN JOHNSON / THE MIAMI HERALD