Ron Paul, Rick Santorum and Mitt Romney (Jae C. Hong/AP)

MESA, Ariz. -- Have Ron Paul and Mitt Romney made some kind of secret alliance to boost Romney to the nomination? Rick Santorum is starting to think so.

After months on the campaign trail, Paul has largely chosen to focus his attacks on candidates not named Mitt Romney, most recently going after Santorum, the latest candidate to pose a challenge to Romney's candidacy. The idea that Ron Paul would spare Romney--while attacking candidates with arguably stronger conservative records than the former Massachusetts governor--has Santorum wondering.

"You'll have to ask Congressman Paul and Governor Romney what they've got going together," Santorum told reporters after the Republican presidential debate in Mesa, Arizona on Wednesday. "Their commercials look a lot alike and so do their attacks."

The idea might not be so far fetched. The Washington Post earlier this month reported that the Romney and Paul camps--as different as they are--have forged a behind-the-scenes alliance. "Romney's aides are 'quietly in touch with Ron Paul,' according to a Republican adviser who is in contact with the Romney campaign," the Post's Amy Gardner reported.

Although Paul has certainly landed a few punches on Romney over the course of the campaign, his efforts against him pale in comparison to the ads and comments he has made about the other candidates.

MESA, Arizona--Newt Gingrich's campaign website is about to go live with this well-circulated picture of Newt in his younger days, a Gingrich aide told Yahoo News.

As many have pointed out, Young Newt bears a striking resemblance to the character Dwight Schrute from "The Office."

Released by Newt Gingrich's presidential campaign

Welcome to Just Show Me on Tecca TV, where we show you tips and tricks for getting the most out of the gadgets in your life. In today's episode we'll show you how to turn off in-app purchases on your iPhone.

Some apps let you buy things to enhance their functionality right from the app. For instance, a game might let you buy some in-game power ups or more farms to sow your oats on. These in-app purchases can be expensive, and you might not want people to be able to buy them, especially if you've got young children. Restricting in-app purchases is easy, and we'll walk you through it step by step.

Take a look at these other episodes of Just Show Me that'll help you become an iPhone master:

• How to update your iPhone's apps
• How to use iMessage on your iPhone
• 3 great fitness apps for your iPhone
• How to take HDR photos on your iPhone

For even more episodes of Just Show Me, check out all our Just Show Me episodes. If you have any topics you'd like to see us cover, just drop us a line in the

If you're willing to spend the next 4 months eating space food for profit, this opportunity is for you

Was your favorite part about a visit to the Air and Space Museum the little packets of space ice cream they sell at the gift shop? If so, you'll be glad to know that scientists are preparing to create a new generation of space desserts — and is seeking the public's help to do it.

The study, being run by jointly run by Cornell University and the University of Hawaii, seeks to simulate a 4-month mission to Mars — or at least, the eating part of the mission. Six lucky "crewmembers" will wear space suits, live in a small Mars-like habitat, and consume nothing but instant space foods for a period of 4 months.

Though the entirety of the study will take place here on Earth, the study is seeking those with NASA-level qualifications. Namely, participants should have a bachelors in the sciences, professional experience, the ability to pass a physical examination, and a history of conducting field research. You will also need to have a normal sense of taste and smell — smokers need not apply.

If

Update, 10:14 p.m. ET: Mitt Romney and Rick Santorum slugged it out tonight in Arizona, but the importance was all about Michigan. Santorum, as the frontrunner in the polls, was on the defensive for most of the night. Romney, as the actual frontrunner, was playing it safe. The strategy paid off for Romney. During the course of the debate, his likelihood of carrying Michigan rose from 66.2 percent, 15 minutes before the debate, to 73.6 percent, at the close of the debate. And, in correlation, Romney's likelihood of gaining the GOP nomination is up over 3 points on the day to 75.7 percent.

Likelihood of Winning Michigan Primary During Arizona Debate1

Sources: Betfair and Intrade

Since we last convened for a good old Republican debate, Mitt Romney was convalescing from his loss in South Carolina and Newt Gingrich was quickly squandering his momentum. A month later, Romney's onetime death grip on the nomination has slackened, and he now faces a non-negligible threat to the nomination.

The chart shows the progress of the likelihood of gaining the

While there has been growing concern that the United States is slowly losing ground as the world's dominant Superpower, Robert Kagan, author of the new book, The World America Made, believes it's all in our head.

"I think that the basic measures of power indicate that the United States really is just as strong as it's ever been," says Kagan, "People have talked themselves into this notion that we no longer have the capacity to play the role we've been playing."

But as the United States begins to pull troops out of Afghanistan, after already pulling out of Iraq, there are questions as to whether America has the resources to assert its power in future conflicts, including the brewing situation with Iran.

"I don't think it's a question of whether we can afford it," says Kagan "we certainly have that capability,"

Kagan doesn't deny that countries like China, whose international power is clearly growing, are a threat to America. Rather, his point is that the threat is nothing new. "We tend

Romney and Santorum (Jae C. Hong/AP)

Mitt Romney fought for frontrunner status in front of a live national audience Wednesday night in the last debate before the crucial primaries on Feb. 28 in Michigan and Arizona.

In his opening statement at the CNN GOP debate, Romney said "I want to restore America's promise, and I'm going to do that --" prompting immediate applause from the audience in the Mesa Arts Center in Arizona. Instead of continuing, he stopped mid-sentence, adding: "That's good enough. As George Costanza would say, 'when they're applauding, stop.' Right?"

The former Massachusetts governor, who was born and raised in Michigan where his father served as governor, challenged former Pennsylvania Sen. Rick Santorum in his first answer of the evening, stating that Santorum voted in Congress to fund Planned Parenthood, the Department of Education, voted to raise the debt ceiling "five times," and to maintain the Davis-Bacon Act, which requires prevailing wages to be paid for public works projects. "Senator, during your term in Congress, the years you've been there, the government's doubled in size," Romney said.

Santorum defended his record, especially on spending, noting his positive rankings from the American Conservative Union.

The back-and-forth between Santorum and Romney was a public display of the battle that has been playing out in campaign ads and stump speeches issued by each candidate in the preceding weeks.

In one heated exchange, Santorum charged that Romney's healthcare plan in Massachusetts was a model for Obamacare. Romney hit back at Santorum saying "the reason we have Obamacare is... that you supported the pro-choice Senator of Pennsylvania and he voted for Obamacare." Santorum endorsed Arlen Specter for U.S. Senate in Pennsylvania in 2004 against a more conservative Republican challenger-- Rep. Patrick J. Toomey. Specter in 2009 announced his decision to run as a Democrat in the 2010 election.

The 2012 presidential race hinges on what happens in Michigan on Tuesday, so of course all of the Republican candidates are in Arizona. It's the 20th debate of the campaign, and the last--presumably--before Super Tuesday on March 6.

During the debate, read and contribute to our liveblog, which will feature real-time discussion and analysis from Yahoo News and ABC News journalists, as well as tweets from Yahoo News reporters on the ground in Arizona. (You can follow the liveblog below, or go to this page, which has also been optimized for tablet and mobile devices.)

The liveblog will feature Rick Klein, the senior Washington editor for ABC News' "World News with Diane Sawyer"; Olivier Knox, the White House correspondent for Yahoo News; Walter Shapiro, who writes the "Character Sketch" column for Yahoo News; Chris Suellentrop, the deputy editor for blogs at Yahoo News, including The Ticket; and Z. Byron Wolf, the political editor of ABCNews.com and a deputy political director for ABC News.

Also participating will be Jeff Greenfield, Joshua Green, and Weston Kosova.

Jeff Greenfield, a veteran political correspondent and the host of PBS' "Need to Know," is the author, most recently, of Then Everything Changed, which will be published in paperback next month.

Joshua Green is a national correspondent for Bloomberg Businessweek. Follow him on Twitter at @JoshuaGreen.

Weston Kosova is the Washington editor for Bloomberg Businessweek.