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Every time a storm brings flooding to a large metropolitan area, there are calls to improve the levee systems that are designed to prevent flooding.

But there's a major problem with doing that. "We don't know where all of our levees are," says Samantha Medlock with the Association of State Floodplain Managers.

Superstorm Sandy capped what's been a pretty impressive couple of years for U.S. natural disasters. There have been wildfires, tornadoes, floods and derechos. And insurance companies are on the hook to pay billions in related claims.

"We're seeing more of everything, and what we're doing is trying to factor that in going forward as we work with others to have a better sense of what the future holds," says State Farm spokesman David Beigie.

On-air challenge: Every answer today consists of the names of two famous people. The last name of the first person is an anagram of the first name of the last person. Given the nonanagram parts of the names, you identify the people.

Example: Madeleine ________ Aaron.

Answer: Madeleine KAHN and HANK Aaron

The news for patients who had injections of fungus-tainted steroids just keeps getting worse.

Both campaigns want to claim momentum heading into the final days of the campaign. This is especially true in battleground states like Iowa, where enthusiasm and voter turnout can make all the difference.

It's a common political metaphor — momentum — but is it a good one?

As the election draws closer, candidates are wrapping up their campaigns and encouraging Americans to vote. Weekends on All Things Considered host Guy Raz talks with NPR's White House correspondent Scott Horsley, who is traveling with President Obama.

Vin Weber, a former Republican congressman from Minnesota and a senior advisor for the Mitt Romney campaign, talks with weekends on All Things Considered host Guy Raz about the momentum going into Tuesday and why Romney does not need Ohio to win the presidential election.

NPR's Ari Shapiro has been crisscrossing battleground states with the Republican candidate Mitt Romney and his campaign. He speaks to weekends on All Things Considered host Guy Raz from Iowa about where Romney is focusing his attention in the final campaign sprint before Election Day.