Authorities increased security in some countries due to fears that violence could intrude on celebrations, but for most Muslims it was a day of peace, family — and most important food.RELATED:Algerian men put to justice for breaking Ramadan fastFriends and relatives feasted on spicy lamb, kebabs and saffron rice, while smokers happily puffed on cigarettes in broad daylight as the three-day Eid al-Fitr festival got under way Friday across the Muslim world.During Ramadan, the faithful are supposed to abstain from food, drink, smoking and sex in a dawn-to-dusk period meant to test the faith and discipline of Muslims."It's nice to be eating, drinking and smoking during the daytime," said Jordanian banker Mutaz Kurdi, 37, as he walked his two children in an Amman park. "Fasting was difficult this year because of the summer heat."The mood was glum in Pakistan as millions of flood victims did their best to celebrate in donated tents and makeshift shelters on Saturday as the country's leaders — criticized for an inadequate response to the disaster — pledged more aid.Charities sent bags of gifts such as shiny plastic wrist bangles and candies to children displaced by the floods, which have affected some 18 million people. The water has receded in many places, but remains head-high in others.Business was brisk for ice cream vendors in Baghdad, where children decked out in holiday finery rode Ferris wheels at amusement parks and raced horse-drawn carts on traffic-free streets. Some boys battled each other with plastic guns, ignoring a ban on toy weapons imposed so children would not be mistaken for militants.Still, soldiers guarded playgrounds and public parks, and additional military and police checkpoints were erected across the Iraqi capital — a reminder the country still faces near-daily bombings and shootings despite a dramatic drop in attacks.In Yemen, authorities warned people to pray inside mosques and deployed heavy security after posters signed by al-Qaida threatened attacks. No outdoor prayers were held in two southern provinces after officials urged people to avoid large gatherings.War-weary Afghans marked the holiday with prayers for peace in mosques as well as family gatherings in homes. President Hamid Karzai urged the Taliban to lay down their arms and join peace talks — a theme often repeated in presidential speeches but so far unheeded by significant numbers of Taliban.The normally festive atmosphere for Eid in Afghanistan was tempered not only by the war but by bitterness over a threat by a small Florida church to burn copies of the Islamic holy book Koran on Saturday, the ninth anniversary of the Sept. 11 attacks. Protests, which have left at least 11 people injured, continued for a second day. Pastor Terry Jones has said the church will not go through with the plan, but Muslim anger over the issue remained high.The controversy also dominated Eid sermons in the Palestinian territories. Hamas leader Ismail Haniyeh told tens of thousands of Muslim faithful at a stadium in the Gaza Strip that they had "to respond to this criminal, this liar, this crazy priest who reflects a crazy Western attitude toward Islam and the Muslim nation."The issue was also on the minds of Muslims in the United States, many of whom urged tolerance.At a mosque in Anaheim, California, Imam Mohammed Ibn Faqih reminded worshippers that the holiness of the Koran could not be sullied by burning it."Burning the Koran by itself, you are burning papers. You are not burning the words of Allah. It is in our hearts," said worshipper Susan Nachawati, an American born in Syria.Despite the controversy, most Muslims worldwide held to traditions of celebration and family.Thousands of children, most dressed in new holiday clothing, thronged the streets of Gaza City, which were decorated with banners wishing a "Happy Eid." Hamas activists distributed candy and toys to children who lost parents during Israel's bruising war in Gaza nearly two years ago and in other conflicts.In the West Bank, men with children in tow paid respects to female relatives — mothers, sisters and aunts — bearing gifts of sweets as well as cash. The women greeted their visitors with offerings of baklava and other pastries.In Egypt, hundreds of thousands flocked to the Giza Zoo while others rode traditional sailboats known as feluccas on the Nile River. Millions prayed at some 3,000 outdoor sites as clerics gave sermons about the need to end disputes among family members and the virtue of forgiveness.