Which global problem keeps you up at night?
That's what we asked Amina J. Mohammed, the deputy secretary-general of the United Nations at the Global Goals Awards ceremony in New York City last week.
It"s not an easy question to answer in a world buffeted by disasters: hurricanes, earthquakes, famine and refugee crises.
But without skipping a beat, Mohammed, a Nigerian diplomat who is No. 2 in command at the U.N., said: