The U.S. Supreme Court's expected ruling in June on Arizona's immigration law will set the blueprint for states where many officials say they face a crisis in trying to crack down on rising numbers of illegal residents.

Yet population changes and various research indicate that the great flow primarily of Latino illegal immigrants, which lasted at least two decades, ended several years ago.

For years, Cushing, Okla., has been on the receiving end of a 500-mile pipeline funneling oil from the Gulf of Mexico to the American heartland.

Starting this weekend, that pipeline will start moving crude in the other direction. That flow reversal could soon have implications at gas pumps around the country.

"For 40 years, crude oil flowed north," says Philip Verleger, a visiting fellow at the Peterson Institute for International Economics. "Today, oil flows south. It's as if we turned the world upside down."

Don't worry if you missed out on Facebook's initial public offering. Chances are, if you own shares in a broad-based index fund, you'll be holding onto some Facebook soon enough.

Facebook is such a huge offering -– with an initial market capitalization of more than $100 billion, it instantly becomes one of the 25 largest "cap" stocks — that it could have a distorting effect on some funds, at least in the short term.

In Egypt's historic presidential race, opinion polls place the oldest candidate with the most political experience far ahead of his 11 rivals.

Many opponents try to portray Amr Moussa as a holdover from the hated regime of Hosni Mubarak. Moussa was Egypt's foreign minister under Mubarak and later the secretary-general of the Arab League.

Yet many voters believe he is the only candidate who can end the country's growing insecurity and economic problems.

When it comes to hepatitis C, things that happened to baby boomers back in the day can make all the difference.

One in 30 baby boomers is infected with virus, says the Centers for Disease Control and Prevention. And most of them don't know it. So, the CDC is moving ahead with a proposal that all baby boomers (born between 1945 and 1965) get a blood test to check for the virus.

The current guidelines call for testing when someone has known risk factors.

With National Dog Bite Prevention Week set to start Saturday, the Insurance Information Institute wants Americans to know that:

-- Insurers paid $479 million in home owner insurance claims involving dog bites last year, up 16.1 percent from the year before.

-- The number of such claims rose 3.3 percent, to 16,292.

-- The average cost per claim grew by 12.3 percent from the year before, to $29,296.

The president of Malawi vowed to overturn her country's ban on homosexual acts.

The BBC reports that President Joyce Banda made the vow in her first address to Parliament.

"Some laws which were duly passed by the August house... will be repealed as a matter of urgency... these include the provisions regarding indecent practices and unnatural acts," Banda said according to the BBC.

It was just this February when Supreme Court Justice Stephen Breyer's West Indies vacation home was broken into by a machete-wielding robber who stole $1,000. No one was hurt.

Now, the Washington Post reports that his D.C home was robbed of housewares:

Following the release of what his campaign called his first ad of the general election, Romney participated in a "tele-town hall" with supporters in the swing states where the ad is running: Virginia, North Carolina, Ohio, and Iowa.

President Obama's performance in Tuesday's Arkansas primary won't be as embarrassing as what happened in West Virginia two weeks ago, when he gave up 41 percent of the vote to someone who happened to be sitting in a federal prison in Texas for embezzlement.

But it may well do more lasting damage to his party.