I worked with 3 men that had this affliction...a brilliant RF Engineer, a Test engineer and a Quality Engineering specialist. It is a tough challenge to overcome. I imagine their childhood years were filled with teasing....but they are good,tough and excelled in their fields.
I know a guy who had a severe stammer. The worst part was the gas mask test in the Army.
It is pretty sad and really sad the way people treat others who stutter. I have a dear friend, a brilliant engineer, who stutters. He has never gotten the credit he is due because of it. People think him either ignorant or annoying. He can be annoying but he is worth the trouble and time. I have stood up for him in all respects and always will because first and foremost he has been and will forever be my friend.