Via Michael Calderone at the Politico, what did Andrea Mitchell know and when did she know it?

UPDATE: Andrea Mitchell has been covering the Clinton campaign for NBC News, and mentioned last night on the air that her memory of the Bosnia trip is different from Clinton’s. So why did Mitchell not say that before? On March 13, the Nightly News ran a segment in the “Where They Stand” series, about how “the issue of leadership in a time of war of guiding this nation in a crisis has loomed large.” Mitchell mentioned then that “Bosnia was a one-day trip with Sheryl Crow and Sinbad to entertain the troops.” But Mitchell did not say Clinton’s “sniper fire” account was erroneous, or that she was there that day. However, last night, Mitchell said on the Nightly News that she was in Bosnia, and that “those of us on that trip recall it differently.” So Mitchell, who’s made note of her “quick fingers” in dialing into Howard Wolfson’s conference calls, didn’t poke holes in Clinton’s account until after CBS played the video.

And who else was on this trip and knew for months that HRC was not telling the truth?