"But as a first reaction, we think it's illogical and we are highly skeptical about it. How could they identify a Jordanian warplane ... in the sky? What was the American lady doing in a weapons warehouse?" — Jordanian government spokesman Mohammed al-Momani about Islamic State group claims that U.S. aid worker Kayla Jean Mueller had been killed in a Jordanian air strike in northern Syria.
"This has never happened before, and this is a rare configuration of a third rail. Do those two add up to the explanation for this terrible, terrible tragedy? Very possibly." — Sen. Charles Schumer of New York on the unique third rail configuration used by Metro-North.
"He is the front man of 'Nightly News' and is seen as the primary arbiter of the facts. For him to get something wrong on something he was involved in casts doubt on his ability to get any facts right." — Kelly McBride, an expert on ethics for the journalism think tank the Poynter Institute, as NBC News investigated statements anchor Brian Williams made about his reporting in Iraq in 2003.