The story

Iranian presidential candidate Mir Hossein Moussavi told followers Monday he will "pay any cost" to contest the country's presidential election results, but said he had little hope his challenge would succeed.

Moussavi made his first public appearance since Friday's vote during a massive rally in central Tehran.

The official results showed incumbent President Mahmoud Ahmadinejad winning with more than 62 percent of the vote, and Iranian Supreme Leader Ayatollah Ali Khamenei -- the true leader of Iran -- has given his blessing to the outcome. Read full article »

CNN's Christiane Amanpour and Samson Desta in Tehran, Brian Todd in Washington and Jason Hanna in Atlanta, Georgia, contributed to this report.

All About IranMir Hossein MoussaviMahmoud Ahmadinejad

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