Mark Memmott

Here's the latest on tropical storm Isaac, which could hit Florida this weekend and drench the Republican National Convention in Tampa early next week:

-- The National Hurricane Center says the center of the storm should pass "to the south of the Virgin Islands and Puerto Rico today ... [then] approach the Dominican Republic tonight and Friday."

It didn't go far, but the NASA rover Curiosity has taken its first test drive on Mars.

"This is how I roll," NASA writes (speaking for Curiosity) with a photo it has released showing the rover's first tracks. "Forward 3 meters, 90 [degree] turn, then back. Electric slide, anyone?"

"We have a fully functioning mobility system," NASA engineer Matt Heverly just told reporters. He said Curiosity ended up moving about 4 1/2 meters during today's test. It also did a full revolution going forward, backed up and did another revolution.

A 2.3 percent increase in sales of previously owned homes in July from June is the latest sign that the housing market is on the mend, Reuters reports.

The National Association of Realtors said this morning that sales of existing homes increased to a seasonally adjusted annual rate of 4.47 million.

Expect to hear about this from the campaign of Republican presidential contender Mitt Romney as he continues to take aim at President Obama's record on the budget and the economy:

The Congressional Budget Office reports this morning that "for fiscal year 2012 (which ends on September 30), the federal budget deficit will total $1.1 trillion ... marking the fourth year in a row with a deficit of more than $1 trillion."

There's word this morning of another wildfire, this time outside the community of Manton in Northern California, where "dozens of buildings, many of them likely homes, have been destroyed," as The Associated Press reports.

Wildfires out West have been a constant topic this summer, it seems, on The Two-Way and other news outlets.

We absolutely, positively will not make a reference to the crown jewels.

Oops, we just did.

It seems that last Friday night in Las Vegas, Prince Harry — third in line to the throne over in England and one of the world's most eligible bachelors — did some "cavorting with two naked women in a Las Vegas hotel room," as the London Evening Standard puts it.

The evening apparently involved some "strip billiards."

The mystery surrounding the death of a rare white buffalo and the claim by some Lakota Sioux in Texas that it had been killed by other Native Americans deepened Tuesday. A local sheriff announced that investigators believe the animal died of a bacterial disease and said the case is now closed.

Two new polls come to much the same conclusion about the 2012 presidential campaign:

The Rocket is going to be pitching again Saturday night.

It's tempting to make a "fight club" reference (and some news outlets have), but the outrageous nature of the allegations seems to call for a more straight-forward approach:

Rosie O'Donnell has chosen an unusual way to tell her fans that she suffered a heart attack last week:

In verse.

On her blog.

And she's using the experience to urge other women to "listen to the voice inside" and call 911 if they suffer the symptoms she did — which she tried to ignore for a day.

An aircraft that had been set to fly Joint Chiefs of Staff Chairman Gen. Martin Dempsey out of Afghanistan today was damaged by shrapnel from rockets fired at the Bagram air field north of Kabul from outside its fences.

Two maintenance workers on the ground were slightly wounded, NPR's Tom Bowman reports. Dempsey was not near the aircraft at the time. He later left Afghanistan on another plane.

Endurance swimmer Diana Nyad has ended her third recent attempt to swim the 100 miles or so from Cuba to Key West, Florida, her official Twitter page says.

That word followed reports from ABC News' Good Morning America and CNN.