One of the most exciting aspects of working on Internet technologies is how quickly the tools you build can spread to millions of users worldwide. It's a heady experience, one that has occurred time and again here in Silicon Valley. But there's also responsibility that attaches to that excitement. For every hundred thousand cases in which a tool improves someone's day, there is another case in which it's used in a life-or-death situation. And for online journalists working on high-risk material, or in high-risk places, that life may be their own or that of a source. That's why CPJ, together with Alexey Tikhonov from Kazakhstan's Respublika, Esra'a al-Shafei from the pan-Arab forum MidEast Youth, and activist Rami Nakhle from Syria, spent this week visiting and meeting with technologists, entrepreneurs, and thinkers in Silicon Valley.