President Obama rejected Wednesday a proposal to build the Keystone XL oil pipeline from Canada to the U.S. Gulf Coast — generating intense debate in both countries. Murray Mandryk, political columnist for the Leader-Post of Sasketchewan, offers a Canadian perspective on the controversy.

President Barack Obama delivers his third State of the Union speech in the House chambers Tuesday night. In his 2012 address, he is expected to focus on jobs and the government's efforts to boost the economy and reduce economic inequality.

Penn State football coach Joe Paterno died Sunday at the age of 85. The legendary coach's reputation was deeply tarnished after sex abuse charges were filed against a former assistant coach. Writers and fans continue to debate how Paterno should be remembered.

It's been 39 years since the Supreme Court legalized abortion in 50 states. But last year, states passed a record number of laws that made getting abortions tougher, including one that bars insurance companies from covering the procedure. Host Michel Martin speaks discusses abortion rights today with three female university students. Advisory: This conversation may not be comfortable for some listeners.

Homeless people may stand a better chance of improving their health when offered a permanent place to live without a requirement for sobriety, the results from a Seattle center suggest.

Climate simulations show that massive technological interventions, known as "geoengineering," could protect food crops from some of the damaging effects of global warming. But researchers say local effects are hard to predict, so geoengineering may not be worth the risk.