Trump's UN Pick Nikki Haley Tells Senate: Israeli Settlements 'Can Hinder Peace'

WATCH: Kerry Slams Gaza Incursion: 'It's a Hell of a Pinpoint Operation'

U.S. secretary of state speaks candidly to his advisers, without noticing open microphone.

U.S. Secretary of State John Kerry was caught on open mic speaking to one of his advisors on Sunday, saying sarcastically "It's a hell of a pinpoint...