<blockquote>It was clear to him that the implication was that should he fail to hand over his passcode, he would not be admitted into the U.S. They asked questions laced with accusations, such as whether he was hiding something "like child pornography?" They said they couldn't answer what they would do with his phone should he disclose the code.</blockquote>
via <a href="http://www.zdnet.com/discriminated-detained-searched-interrogated-at-the-united-states-border-7000020045/">Welcome to the United States: Discriminated, detained, searched, interrogated special report | ZDNet</a>.