Facebook is key to year’s IPO market

If the social network goes public as anticipated, how it fares could influence whether many other companies - including nine in Mass. - take the leap this year.

Fox News | 9 p.m.

Smaller lineup of Republican candidates meet for debate

With just five days before a crucial primary, a narrowed five-person field will gather in Myrtle Beach tonight to desperately try to alter the trajectory of Mitt Romney.

In remembering King, speakers call for faith and action

Governor Deval Patrick, Mayor Thomas Menino, and other speakers recalled the Rev. Martin Luther King Jr.’s life today at an annual breakfast celebrating King’s legacy.

State Police DNA techniques unlock Mediterranean secrets

A Mass. archeologist is using crime-solving DNA methods to reveal what ancient Greeks carried in the clay pots they stacked in the hulls of ships.

Rick Santorum said John F. Kennedy created ‘‘the foundation for attacks on religious freedom.’’

Matt Rourke/associated press

Opinion

Faith reduced to caricature

A once-marginal version of extremely conservative Catholicism has lately come into its own by linking up with far right-wing evangelical Protestantism, creating a powerful new political movement, writes James Carroll.

Republican presidential hopeful Jon Huntsman announces the suspension of his 2012 presidential bid in Myrtle Beach, South Carolina.

Jon Huntsman drops out, endorses Romney

The former Utah governor ended his bid for the presidency today. “I believe it is now time for our party to unite around the candidate best equipped to defeat Barack Obama,” said Huntsman.

Lucy Berrington

Is the American dream still available?

As the US appears to be falling short of its long-held aspirations, we can ask whether today's immigrants are arriving at the party as it's winding down.

“This race has degenerated into an onslaught of negative and personal attacks not worthy of the American people and not worthy of this critical time in our nation’s history.”

Jon Huntsman 

Sports

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New England will meet Joe Flacco and Baltimore Sunday at Gillette Stadium in the AFC Championship game with a chance to play in Super Bowl XLVI on the line.

Plenty of bad blood between Patriots and Ravens

Based on their brief but intense history, there’s a lot of animosity between New England and Baltimore, who face off in the AFC Championship this Sunday.

Health and wellness

G force

“Air pollution is an example of something you’re not able to modulate easily on your own,” said Dr. Megan Sandel. “You are relying on the federal and state government to regulate it.”

The doctor prescribes clean air

Dr. Megan Sandel, an associate professor of pediatrics and public health at Boston Medical Center, is an expert on asthma and air pollution.

Arts

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TELEVISION REVIEW

Sarah Jones and Sam Neill star in the new Fox series, “Alcatraz,’’ from “Lost’’ creator J.J. Abrams.

‘Alcatraz’ a new island of mystery

The island of “Lost’’ and the famous prison exist in different worlds, but “Alcatraz’’ has a drop of story DNA from previous J.J. Abrams efforts.