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Rising waters of the Missouri submerge labor monument

As a monument to the workers who built the town of Omaha, Nebraska was submerged by floodwaters on Wednesday, engineers were toiling sixty miles downstream to build a temporary floodwall around the town of Hamburg, Iowa.

Read our latest story on the Missouri River flooding and a report on "the unprecedented onslaught of extreme tornadoes, flooding, drought and wildfire" that hit the country in April.