As of Thursday morning, CBS's morning and evening newscasts have yet to mention a revelation made 
by their own investigative correspondent, Sharyl Attkisson, on Tuesday –
that Secretary of State John Kerry told Congress "he will not honor the
request to make Benghazi survivors available for questioning."
Wednesday's CBS Evening News aired a full report on the State Department's slow progress in upgrading security at U.S. diplomatic posts in the aftermath of the September 11, 2012 Islamist attack, but failed to mention Kerry's refusal. Margaret Brennan also let the Obama administration and Senator Robert Menendez hint that congressional Republicans were to blame for not appropriating the $2.2 billion needed for the security upgrades [MP3 audio available here ; video below].
Anchor Scott Pelley noted the anniversary of the terrorist attack in Libya during his introduction for Brennan's report: "One year ago today, in Benghazi, Libya, militants linked to al Qaeda stormed the U.S. mission and another building about a mile away. In an attack that lasted for hours, U.S. Ambassador Christopher Stevens and three other Americans were killed. That brought calls to strengthen security at U.S. diplomatic outposts. Margaret Brennan tonight takes a look at what's been done."
The CBS correspondent spent much of the segment documenting the ongoing security weaknesses at U.S. embassies and consulates: