Cancer prevention guidelines recommend that men and women get screened for colorectal cancer every 10 years between the ages of 50 and 75.

(NPR's Larry Abramson is among the correspondents traveling with Defense Secretary Leon Panetta in Asia this week. Monday, he told us about a poignant exchange of artifacts. Today, he gives us a glimpse of what it's like to be in the secretary's motorcade.)

Calling them "persona non grata," Syria today told 17 diplomats — including the U.S. ambassador — that they are no longer welcome in the country.

Jury selection starts today in the trial of former Penn State assistant football coach Jerry Sandusky, who faces allegations that he sexually abused at least 10 boys over 15 years, sometimes on the school's campus. Sandusky has pleaded innocent.

"A torrential downpour and strong winds prevented emergency crews from returning Tuesday morning to a devastated neighborhood where a commercial airliner crashed, killing all 153 people aboard the plane and an undetermined number of people on the ground," The Associated Press reports from Lagos.

The wire service adds that:

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DAVID GREENE, HOST:

Polls open at 7 a.m. local time (8 a.m. ET) in Wisconsin, where the bitter battle over whether to recall Republican Gov. Scott Walker is finally coming to a conclusion.

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RENEE MONTAGNE, HOST: