Thousands of protesters have rallied in Kyrgyzstan's capital demanding that the president stand by his pledges to fight crime and corruption - or quit. Making a surprise appearance at the opposition rally in Bishkek, Kurmanbek Bakiyev was booed and whistled at by about 10,000 people. "I am not Akayev, I will not run away from my people, I am not afraid," President Bakiyev said before walking away, heckled by the crowd.Kyrgyzstan has been volatile since Bakiyev came to power last year after a coup that ousted Askar Akayev. Last July, Bakiyev won the presidential election by a landslide, pledging to bring order and democracy. The opposition, led by Omurbek Tekebayev, a former speaker of parliament, demand that Bakiyev limit presidential powers as promised during the election, give more authority to parliament and the prime minister, and eradicate corruption and crime.