Cuba has shown no desire to rejoin. Socialist states like Venezuela and Nicaragua say they want to form an association that excludes the US.
On 20th anniversary of massacre, few remember the key role state employees played in supporting students – and the price some paid for organizing.
President Mahmoud Ahmadinejad faced off against one of his three opponents, Mir Hossein Mousavi, Wednesday night in the second of six debates leading up to June 12 elections.
The president addressed extremism, the Israeli-Palestinian conflict, women's rights, and nuclear proliferation, among other topics.
Beijing also lashed out at the US after Secretary of State Clinton said China should examine the "dark events" of its past.
Many welcomed the US president's conciliatory tone and references to Islamic history. Skeptics pointed to the price Pakistan pays for ongoing US involvement in Afghanistan.