Army Corps Of Engineers

A Lobbying group in Illinois is weakening regulations from the Army Corps of Engineers that prevents towns from building levees that harm their neighbors.

• By Lisa Song, Patrick Michels & Alex Heeb

"If I can one day visit a place and say that I helped make it a more livable and beautiful place, I'll be happy," says Chen, who's on our list of this year's most exciting young thinkers.

• By Rosie Spinks

And local governments continue to approve real estate development inside floodplains.

• By Barry Yeoman