[1] http://www.washingtonpost.com/blogs/post-partisan/post/presi...
[2] http://www.nytimes.com/2012/09/16/opinion/sunday/introverts-...
Edit: clarity
[1] http://www.washingtonpost.com/blogs/post-partisan/post/presi...
[2] http://www.nytimes.com/2012/09/16/opinion/sunday/introverts-...
Edit: clarity