Readers sent us letters regarding the contributions of human-caused and volcanic emissions of sulfur dioxide, or SO2.
Sen. Ted Cruz has criticized President Obama and the White House for not mentioning how religious discrimination fueled terrorist attacks in Paris and Libya this year. But to make his point, Cruz focuses on certain remarks and ignores others.
Mike Huckabee is making another run at the presidency after a failed attempt in 2008. This video from FlackCheck.org looks at some of the old lines he repeated during his May 5 announcement speech.
The Republican presidential primary has three new contenders: former Arkansas Gov. Mike Huckabee; former Hewlett-Packard CEO Carly Fiorina; and retired neurosurgeon Ben Carson.