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1. Spacecraft teams up with comet for historic match making

A steadfast spacecraft called Rosetta finally joined an icy and mysterious comet Wednesday after traveling 10 years and 3.5 billion miles to reach it. The two will travel the solar system together, making Rosetta the first spacecraft to spend quality time with a comet. For a year and a half, maybe longer, the two will approach the sun. As the comet begins to spew dust and ice, the Rosetta will act like a GoPro camera, taking pictures along the way.

2. Nearly 1 in 10 cancer survivors smoke, despite risks

A new study finds 9.3% of cancer survivors, followed for an average of 9 years, reported a smoking habit. Smoking is most common among those who have had lung and bladder cancers, types that are strongly associated with smoking. Additionally, it increases recurrence odds, decreases survival time and makes any further cancer treatment less effective, so efforts to help these folks quit deserve more attention, say researchers from the American Cancer Society.

3. World's most-decorated Olympian back on the blocks

After a quick and "boring" retirement, Michael Phelps will take to the pool Wednesday for the U.S. national championships, competing in four events. He's a different swimmer this time around, swimming on his own terms for the first time in his life, he says. These national championships, along with the Pan Pacific Championships in Australia, will determine the U.S. team for next year's world championships and pave the road to the 2016 Olympics.

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4. Michelle Obama welcomes spouses of African leaders to summit

The reigning FLOTUS collaborated with the George W. Bush Institute and Department of State to host "Investing in Our Future at the U.S.-Africa Leaders Summit" event that will see more than 30 spouses of African leaders in attendance. As part of the President Obama's Summit in Washington, this day-long event hopes to highlight the impact first spouses can have on their country and communities. Last night, the Obamas hosted African leaders at a White House gala.

5. Time to change that password

With news that as many as 1.2 billion user names and password combinations had been stolen, security experts are urging consumers to be more vigilant online.

Bonus: The Voting Rights Act of 1965 celebrates 49 years

President Lyndon Johnson signed the key piece of Civil Rights legislation into law on this day in 1965. The law helped to prohibit racial discrimination running rampant in the U.S. voting system.

And, the essentials:

Weather: Colder, wetter conditions expected throughout the country.

Stocks: U.S. stock futures were trading modestly higher.

TV Tonight: Wondering what to watch tonight? TV critic Robert Bianco looks at So You Think You Can Dance, Criminal Minds, and House Hunters International.

If you missed Tuesday's news, we've got you covered here.

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Contributing: Kim Painter and Traci Watson, Special for USA TODAY

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