UN Secretary-General Antonio Guterres said a "disappointing" $1.7 billion had been pledged by countries on Monday for humanitarian aid in Yemen - less than half the $3.85 billion the world body was seeking for 2021 to avert a large-scale famine.  "For most people, life in Yemen is now unbearable. Childhood in Yemen is a special kind of hell. Yemeni children are starving,"