Russia's opposition is turning to the streets to protest Sunday's presidential election which returned Vladimir Putin to power. The protesters may have agreed on a set of very catchy slogans, but they're not a cohesive political movement.

People have been avoiding checked-baggage fees by carrying on bags — that includes bags too big for the overhead bins. Now United and Delta Airlines are enlarging the bins. There is some fear, however, this will prompt people to bring bags that are even larger.

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RENEE MONTAGNE, HOST:

OK. And we all noticed rising costs at the gas pump. But those costs will also mean rising prices for airline tickets.

As NPR's Annie Baxter reports, that's already happening.

ANNIE BAXTER, BYLINE: If you've been looking for a great deal on airline tickets recently, you've probably been disappointed.

BOB MANN: Carriers have raised prices successfully twice, so far this year and that's out of four attempts. And I would expect another attempt literally within in a week.

Republican presidential candidates have a chance to win hundreds of convention delegates after voters cast their ballots in Super Tuesday contests. The delegate count wouldn't be enough for any candidate to clinch the nomination, but it would help. Mitt Romney is hoping to return to front-runner status but Rick Santorum, Newt Gingrich and Ron Paul are trying to prevent that.

Morning Edition has four reports on Monday's campaigning leading up to Super Tuesday's 10 primaries and caucuses.

NPR's Don Gonyea was traveling with former Senator Rick Santorum in Ohio.

First responders never know what they'll find when they get called to an accident site. Sometimes crews have to rescue dairy cows from collapsed barns, evacuate horses during wildfires or move pigs off the highway after an accident. These first responders often don't have the proper training to handle large animals.

NPR's Dan Charles has been looking into the problem of weeds that America's most widely used weed-killer won't kill anymore. It's a sneak preview of a story that will air later this week.

While Republican candidates continue to slug it out for their party's White House nomination, President Obama is getting a head start on the general election.

Obama's grassroots campaign is already hard at work with volunteers hosting house parties and staffing phone banks to find and mobilize the president's supporters. The campaign has opened five offices in Virginia, and that's not counting the basement of Sue Langley's house in the Washington, D.C., suburb of Vienna, where more than a dozen volunteers assembled this past weekend.

Have you ever splurged on a highly rated bottle of Burgundy or pinot noir, only to wonder whether a $10 or $15 bottle of red would have been just as good? The answer may depend on your biology.

A new study by researchers at Penn State finds that when it comes to appreciating the subtleties of wine, experts can taste things many of us can't. "What we found is that the fundamental taste ability of an expert is different," says John Hayes of Penn State.