Umpires, like players, are expected to show constant improvement each season and at each level. Inconsistent plate work and the inability to handle situations are probably the two biggest problems that minor league umpires face. ↗
The biggest public health challenge is rebuilding health systems. In other words, if you look at cholera or maternal mortality or tuberculosis in Haiti, they're major problems in Haiti, but the biggest problem is rebuilding systems. ↗
I believe that the biggest problem that humanity faces is an ego sensitivity to finding out whether one is right or wrong and identifying what one's strengths and weaknesses are. ↗