HAVANA (AP) — Cut off from the Internet, young Cubans have quietly linked thousands of computers into a hidden network that stretches miles across Havana, letting them chat with friends, play games and download hit movies in a mini-replica of the online world that most can't access. Home Internet connections are banned for all but a handful of Cubans, and the government charges nearly a quarter of a month's salary for an hour online in government-run hotels and Internet centers. A small minority have covertly engineered a partial solution by pooling funds to create a private network of more than 9,000 computers with small, inexpensive but powerful hidden Wi-Fi antennas and Ethernet cables strung over streets and rooftops spanning the entire city. Cuban officials say Internet access is limited largely because the U.S.