Leader vows to win this war

Brazilian President Dilma Rousseff announced an attack on the mosquito that spreads the Zika virus, which researchers have linked to a rare birth defect.

Debate viewership ranks sixth

The seventh Republican presidential debate and the first one without drawing card Donald Trump was seen by 12.5 million viewers on Fox News Channel. Thursdays debate ranked sixth among the seven GOP debates so far in viewership.

Cracking down on gun sales

Facebook announced a new policy barring private individuals from advertising or selling firearms on the worlds largest social network.

Bill signed in Flint water crisis

Michigan Gov. Rick Snyder signed into law $28 million more in emergency funding to address Flints lead-contaminated water.

Stock market makes big gains

Stocks soared on the last trading day of January, with Microsoft, Visa and other tech stocks making the largest gains.