The boisterous celebration of Irish music and dance, which became an unlikely global show-biz phenomenon in the 1990s, is back with a new generation of dancers to mark its quarter-century Source

The Dixie Chicks, comprised of lead singer Natalie Maines and sisters Martie Maguire and Emily Strayer, are one of the biggest female music acts of all time, with tens of millions of records sold, and 13 Grammy Awards. They talk with correspondent Tracy Smith about the Iraq War controversy that led to boycotts and blacklists of their music over comments made about President George W. Bush, and how failed relationships became a source of inspiration for their upcoming album, “Gaslighter,” their first studio album together since 2006’s Grammy-winning smash “Taking the Long Way.” Source

The outbreak of Spanish flu during World War I infected about one-third of the Earth’s population, causing at least 50 million deaths, including more than a half-million in the United States, where news reports on the epidemic were prohibited Source

From presidential primaries to the Wikipedia Edit-a-Thon, “Sunday Morning” takes a look at some notable events of the week ahead Source

Four years ago, Dan Peterson was in his darkest days. His wife had just died, he was severely depressed, and was out grocery shopping for himself in Augusta, Ga., when he was spotted by four-year-old Norah Wood, who said, “Hi, old person!” and demanded a hug. The two struck up an unlikely friendship which continued through Norah’s kindergarten graduation and weekly visits to his garden, with countless hugs along the way, even up to the day before Dan died last month at age 85. Steve Hartman revisits the friendship that touched the world, which offered a prescription for happiness. Source

“Sunday Morning” takes us along the Arrowhead State Trail in northern Minnesota, a winter playground for river otters. Videographer: Scot Miller. Source

The teen pop singer-turned actress, who’d considered dropping out of the entertainment business before starring in the hit TV series “This Is Us,” has now released a new album Source

The pandemic of H1N1 virus in 1918 infected about one-third of the world’s population, causing at least 50 million deaths, including more than a half-million in the United States. Martha Teichner reports. Source

The book “Picture: Muhammad Ali” shows how photographers from the Louisville Courier-Journal, the boxer’s hometown newspaper, captured both public and private moments of “The Greatest.” Tony Dokoupil talks with the newspaper’s photographers who covered Ali throughout his career. Source

In the 1990s “Riverdance,” a boisterous celebration of Irish music and dance, became an unlikely show-biz phenomenon, with sold-out performances around the globe. Now it’s back with a 25th anniversary show, headed for New York’s Radio City Music Hall. Correspondent Mark Phillips talks with John McColgan and Moya Doherty, producers of the original “Riverdance” and its newest iteration, and with 22-year-old dancer Amy-Mae Dolan, who has never known a world without “Riverdance.” Source