5 Things to Know This Morning

Jan. 6, 2013— -- Your look at the five biggest and most buzz-worthy stories of the morning.

1. Arctic Blast to Bring Coldest Temps in Decades
A "polar vortex," a whirlpool of frigid and dense air, has plunged parts of the U.S. in the coldest temperatures in decades.

2. Iraq PM Urges People of Fallujah to Expel Al Qaeda
Iraq's Prime Minister Nouri al-Maliki urged residents of Fallujah to "expel" al- Qaeda militants to avoid an all-out battle.

3. Liz Cheney Ends Wyoming Senate Bid
Liz Cheney is poised to drop out of the Senate race in Wyoming, two Republican officials told ABC News, reaching a decision over the holidays that it was time to abandon her Republican primary challenge against Senator Mike Enzi.

4. Girl Declared Brain Dead Moved From Hospital
The family of Jahi McMath, 13-year-old California girl declared brain dead after a tonsillectomy, has been taken from Children's Hospital & Research Center Oakland to be cared for elsewhere.

5. Seminoles, Tigers to Square Off in BCS Championship
The Florida State Seminoles and Auburn Tigers square off tonight in Pasadena, Calif., for the BCS Championship.