Leonard Nimoy tells the story behind 'live long and prosper' - http://www.washingtonpost.com/posttv/national/leonard-nimoy-tells-the-story-behind-live-long-and-prosper/2015/02/27/b70e97fa-bec1-11e4-9dfb-03366e719af8_video.html
The Jewish roots of Leonard Nimoy and ‘live long and prosper’ - http://www.washingtonpost.com/blogs/style-blog/wp/2015/02/27/the-jewish-roots-of-leonard-nimoy-and-live-long-and-prosper/