"What this shows us is that we the people can harness an incredible power against oppressors by simply communicating with each other. It shows the power in unity through technology." So says James Karl Buck, an American student who sent a 1-word message (“Arrested”) via cell phone to Twitter to help free himself from an Egyptian jail. Now back in the U.S., he’s using all the digital-media tools at his disposal to demand the release of his translator, Mohammed Maree. “He’s only in prison ... because he wanted to help me,” Buck tells CNN. “Now I’ve got to repay the favor.” Check out Buck’s story, and help if you like. Oppression flourishes in silence, so Tweet about it with your friends.

—Posted by David Gianatasio