The big story this morning, as we reported earlier, is the arrest of a Pakistani-born U.S. citizen in connection with Saturday's failed car-bombing in New York City's Times Square. NPR's Dina Temple-Raston reports that Faisal Shahzad, 30, is said to have been the person who several weeks ago bought the SUV involved in the attempted act of terrorism. We'll be updating the blog throughout the day as that story develops.

Among the other stories making headlines are:

— The Associated Press — Death Toll Rises In Flooding Of Tennessee, Mississippi And Kentucky: From Nashville, the wire service reports that "the Cumberland River having reached its crest was little comfort amid fears that receding floodwaters could reveal more victims of deadly storms that swamped much of middle Tennessee. The death toll was at 29 across three states, but hope was slim that number would stand Tuesday as recovery begins in earnest."

Related story by The Tennessean — "Nashville's Water Supply Is Threatened": "On a day when the Cumberland River continued to rise, crippling Middle Tennessee neighborhoods, businesses and several of Nashville's iconic music, sports and tourist spots, the most critical threat Monday night was that floodwaters would knock out the city's drinking supply."

At Morning Edition's Facebook page — First person stories and links to photos of the flooding.

— Boston Globe — Massachusetts Governor Lifts Boil Order; Boston Water Crisis Ends: "Governor Deval Patrick has announced that the 'boil-water' order has been lifted for the dozens of communities that lost their supply of fresh drinking water on Saturday, ending a water crisis that, at one point, had inconvenienced nearly 2 million people in the Boston area." The rupture of a water main in the town of Weston caused the crisis.

— Houston Chronicle — "BP Pursues At Least Five Ways To Stop Spill": "The company says all of the plans are moving forward simultaneously, even though some may turn out to be unnecessary or unsuccessful. But several of the ideas, once considered backup solutions, have begun to figure more prominently into the sweeping effort, including work on a subsea collection system for leaking oil and the drilling of a relief well to stop the flow from the damaged one. That work is centered at BP's offices in west Houston, where hundreds of engineers and technical specialists, representing 160 companies, are assembled to attack the growing crisis."

Related story by USA TODAY — "Winds Holding Gulf Oil Spill Offshore": From Pass Christian, Miss., the newspaper reports that "some good news swept through here Monday: Winds so far are keeping most of the Gulf oil spill away from shore, and chemicals are doing a decent job dispersing the giant swath of slick crude oil looming off the coast. Charlie Henry, a science coordinator with the National Oceanic and Atmospheric Administration (NOAA), cautioned that the long-term path of the oil remains unclear. Officials from Louisiana to Florida said they are still preparing for an environmental catastrophe in days and weeks ahead."

— Morning Edition — Iran And U.S. Spar At U.N.: "The United Nations was the scene of a diplomatic clash between the United States and Iran Monday. Iran's president showed up for the opening of the Nuclear Nonproliferation Treaty review conference. Secretary of State Hillary Clinton accused him of trying to divert attention away from Iran's record of violating its international obligations." NPR's Michele Kelemen reports.

— BBC News —Flights To Resume In Ireland After New Ash Cloud Concerns Are Eased: "All flights in and out of Northern Ireland and the Irish Republic will resume (around midday) after being grounded owing to a fresh volcanic ash threat. Airspace over Scotland's Outer Hebrides will reopen at the same time after closures to Tiree, Barra and Benbecula airports plus Campbeltown in Argyll."

— Politico — Five Things To Watch In Today's Primaries: There are primaries today in Ohio, Indiana and North Carolina, and Politico runs through some of the things to keep an eye on in each.