President Obama this week announced $8.3 billion in federal loan guarantees to help build two new nuclear reactors in Georgia, but environmental groups pushed back against the form of alternative energy they called "inherently dangerous." Gwen Ifill talks to both…

The Environmental Protection Agency proposed stricter new limits on smog Thursday that could have big health benefits, but could also cost up to $90 billion for corporations and the government to implement. The proposal would limit smog to…