Jennifer Winston, of Concord, excused herself and walked out to her car before allowing her tears to flow. She was working in the hotel industry, and a confrontational co-worker had left her upset. "I felt like crying but I wouldn't do it in front of people," Winston says. "I think in the workplace it shows weakness and it makes everyone uncomfortable." Tears often involve a complexity of emotions. They can be of elation, sorrow, stress, frustration -- or all of the above. And while Winston was able to prevent public waterworks, much attention has been paid recently to figures in...