Director: Alvaro Alvarez; Producers: Reha Kansara and Will Grant; Editor: Michael Wendling

A year ago, Cuba's socialist government allowed 3G internet access on the island for the first time. Although it's still relatively expensive and slow, a growing number of Cubans are going online and signing up for social media accounts. Among them are activists who hope to use digital tools to drive rapid change. We've been meeting three of them.