The project, which lasted more than two years and drew tens of thousands of subscribers, sought to evade Cuba's stranglehold on the Internet with a primitive social media platform. First, the network would build a Cuban audience, mostly young people; then, the plan was to push them toward dissent, The Associated Press learned.

Yet its users were neither aware it was created by a US agency with ties to the State Department, nor that American contractors were gathering personal data about them, in the hope that the information might be used someday for political purposes.

The project, dubbed "ZunZuneo," slang for a Cuban hummingbird's tweet, was publicly launched shortly after the 2009 arrest in Cuba of American contractor Alan Gross. He was imprisoned after traveling repeatedly to the country on a separate, clandestine USAID mission to expand Internet access using sensitive technology that only governments use.

The AP obtained more than 1,000 pages of documents about the project's development. It independently verified the project's scope and details in the documents through publicly available databases, government sources and interviews with those involved in ZunZuneo.

The estimated $1.6 million spent on ZunZuneo was publicly earmarked for an unspecified project in Pakistan, public government data show, but those documents don't reveal where the funds were actually spent.

For more than two years, ZunZuneo grew and reached at least 40,000 subscribers. But documents reveal the team found evidence Cuban officials tried to trace the text messages and break into the ZunZuneo system. USAID told the AP that ZunZuneo stopped in September 2012 when a government grant ended.

NTJ/NJF