FILE - In this April 18, 2014 file photo, President Barack Obama speaks in the Rose Garden of the White House in Washington. House Speaker John  Boehner of Ohio says Congress is sending President Barack Obama legislation to build the Keystone XL pipeline on Tuesday. The White House is indicating Obama will quickly veto it in private over Republican lawmakers' urging that he sign it. It would be the third veto of Obama's presidency.  (AP Photo/Jacquelyn Martin, File)

Defying GOP, Obama vetoes Keystone XL pipeline bill

The move puts a freeze on a top GOP priority, at least for now. It also reasserts Obama’s authority over a project that’s become a flashpoint in the national debate about climate change.

An ambulance drives on the snow as seen through a window, Monday, Feb. 23, 2015, in Abilene, Texas. Freezing rain affected travel in nearly half of Texas on Monday, and winter storm warnings were issued in the northern part of the state. (AP Photo/The Abilene Reporter-News, Nellie Doneva)

Winter precipitation could hamper commute across South

A mix of snow, sleet, rain and freezing rain is expected in parts of the southern Plains and South, where school districts in more than a half-dozen states from Texas east have canceled or delayed classes.

In this Thursday, Dec. 18, 2014 photograph, a person walks through a Merck & Co. company building, in Kenilworth, N.J.  Merck & Co. on Tuesday, Feb. 24, 2015 announced it has granted a free license allowing one of its HIV medicines to be made and sold inexpensively for use in young children in poor countries hard hit by the AIDS virus. (AP Photo/Mel Evans)

Merck grants free license for pediatric HIV drug

Drugmaker Merck & Co. has granted a free license allowing one of its HIV medicines to be made and sold inexpensively for use in young children in poor countries hard hit by the AIDS virus.