https://phys.org/news/2018-09-twitter-ceo-jack-dorsey-cool.html

Dorsey, who meditates regularly, live-tweeted his opening statement and answered questions in a low, measured tone. He repeatedly declined to rise to the bait offered by sometimes scathing legislators, instead holding forth as the nerdy and earnest CEO who just wants to improve his company and its role in the world.

When Arkansas Republican Sen. Tom Cotton pressed Dorsey on Twitter's allegiance to the U.S., Dorsey steered a serene middle course. Asked if he saw a difference between cooperating with the U.S. government and the Russian or Chinese governments, Dorsey demurred. "Not sure what you mean," he said.