Ban Ki-moon
A bid to drive home a message about wasting food.
There must be no impunity for "atrocious" crimes, Ban said.
422,000 Besieged Syrians Didn't Get Food Aid In July, It's World's 'Largest Humanitarian Crisis:' UN
There were challenges due to conflict, insecurity and deliberate obstructions.
It's also working to eliminate hunger and achieve gender equality.