Marine One, carrying President Obama, takes an aerial tour of Oso, Wash., on Tuesday. The president made a brief stop in the area devastated by last month's mudslide. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

Washington mudslide survivor Amanda Skorjanc, 25, spoke from her hospital bed Wednesday about what it was like when her home was engulfed. She and her infant son, Duke, survived. Dan Bates/The Herald/AP hide caption

itoggle caption Dan Bates/The Herald/AP

Gabriella Botamanenko (center left) hugs her mother, Angela Botamanenko, during a vigil for mudslide victims at the Darrington Community Center Saturday. A March 22 mudslide in a nearby community killed at least 30 and left many missing. David Ryder/Getty Images hide caption

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Crews work at the mudslide site Oso, Wash., Saturday, one week after a massive mudslide devastated a small community. Officials have dropped the number of missing people from 90 to 30. David Ryder/Getty Images hide caption

itoggle caption David Ryder/Getty Images

Volunteers unload donated supplies during heavy rains in Darrington, Wash., Friday. One week after a massive mudslide hit nearby Oso, crews are working to find and identify victims. Data about landslides' annual effects are decades old, geologists say. David Ryder/Getty Images hide caption

itoggle caption David Ryder/Getty Images