Summary: Former Port Authority official David Wildstein released a letter Friday claiming "evidence exists" that shows Governor Christie knew about the George Washington Bridge lane closings as they were happening, contrary to what he said in a January press conference. Christie responded with a letter of his own accusing Wildstein and The New York Times of botching the facts. New Jersey Public Radio reporter Matt Katz discusses the latest news, and tries to lay out a "what-Christie-knew-when" timeline.
