Environment

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Search dog Stratus leaps through a debris field while working with a handler following a deadly mudslide, Tuesday, March 25, 2014, in Oso, Wash. At least 14 people were killed in the 1-square-mile slide that hit in a rural area about 55 miles northeast of Seattle on Saturday. Several people also were critically injured, and homes were destroyed. (AP Photo/Elaine Thompson)

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Shore bird conservationists Pete Deichmann, right, and Kristen Vale look for birds with oil on them at the Bolivar Flats Bird Sanctuary Tuesday, March 25, 2014, in Bolivar, Texas. Environmental groups are trying to protect tens of thousands of wintering birds who make their home along the bay at this time of year. Up to 170,000 gallons of tar-like oil spilled into the major U.S. shipping channel after a barge ran into a ship Saturday. (AP Photo/Pat Sullivan)

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Shore bird conservationists Pete Deichmann, left, and Kristen Vale look for birds with oil on them at the Bolivar Flats Bird Sanctuary, Tuesday, March 25, 2014, in Bolivar, Texas. Environmental groups are trying to protect tens of thousands of wintering birds who make their home along the bay at this time of year. Up to 170,000 gallons of tar-like oil spilled into the major U.S. shipping channel after a barge ran into a ship Saturday. (AP Photo/Pat Sullivan)

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A tern picks at possible food at the Bolivar Flats Bird Sanctuary Tuesday, March 25, 2014, in Bolivar, Texas. Environmental groups are concerned about shore birds eating oil covered food along the beaches. Up to 170,000 gallons of tar-like oil spilled into the major U.S. shipping channel after a barge ran into a ship Saturday. (AP Photo/Pat Sullivan)

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Lisa Pittman, left, and Danene Birtell clean oil off a lesser scaup, Tuesday, March 25, 2014, in Baytown, Texas. Environmental groups are trying to protect tens of thousands of wintering birds who make their home along the bay at this time of year. Up to 170,000 gallons of tar-like oil spilled into the major U.S. shipping channel after a barge ran into a ship Saturday. (AP Photo/Pat Sullivan)

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An oil covered lesser scaup is examined for damage at a rescue site, Tuesday, March 25, 2014, in Baytown, Texas. Environmental groups are trying to protect tens of thousands of wintering birds who make their home along the bay at this time of year. Up to 170,000 gallons of tar-like oil spilled into the major U.S. shipping channel after a barge ran into a ship Saturday. (AP Photo/Pat Sullivan)

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A lesser scaup has his beak cleaned at a wildlife rescue site, Tuesday, March 25, 2014, in Baytown, Texas. Environmental groups are trying to protect tens of thousands of wintering birds who make their home along the bay at this time of year. Up to 170,000 gallons of tar-like oil spilled into the major U.S. shipping channel after a barge ran into a ship Saturday. (AP Photo/Pat Sullivan)

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A lesser scaup is held for cleaning at a wildlife rescue site, Tuesday, March 25, 2014, in Baytown, Texas. Environmental groups are trying to protect tens of thousands of wintering birds who make their home along the bay at this time of year. Up to 170,000 gallons of tar-like oil spilled into the major U.S. shipping channel after a barge ran into a ship Saturday. (AP Photo/Pat Sullivan)

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Searchers in boats and on foot look through debris following a deadly mudslide Tuesday, March 25, 2014, in Oso, Wash. At least 14 people were killed in the 1-square-mile slide that hit in a rural area about 55 miles northeast of Seattle on Saturday. Several people also were critically injured, and homes were destroyed. (AP Photo/Elaine Thompson)

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A searcher steps off of his boat to look through debris following a deadly mudslide, Tuesday, March 25, 2014, in Oso, Wash. At least 14 people were killed in the 1-square-mile slide that hit in a rural area about 55 miles northeast of Seattle on Saturday. Several people also were critically injured, and homes were destroyed. (AP Photo/Elaine Thompson)

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A flag, put up by volunteers helping search the area, stands in the ruins of a home left at the end of a deadly mudslide from the now-barren hillside seen about a mile behind, Tuesday, March 25, 2014, in Oso, Wash. At least 14 people were killed in the 1-square-mile slide that hit in a rural area about 55 miles northeast of Seattle on Saturday. Several people also were critically injured, and homes were destroyed. (AP Photo/Elaine Thompson)

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Workers walk through mud as heavy equipment operators work to clear debris Tuesday, March 25, 2014, from Washington Highway 530 on the western edge of the massive mudslide that struck the area Saturday, killing at least 14 people and leaving dozens missing. (AP Photo/Ted S. Warren, Pool)