As aid workers struggle to feed and shelter millions of survivors, world leaders have arrived in Jakarta to tackle Asia's tsunami crisis and a 2.3 billion US dollar humanitarian relief operation. World leaders will meet on Thursday to seek a way to prevent such a catastrophe - where survivors are still burying their dead 10 days after a tsunami killed around 150,000 people - from ever occurring again. Indonesia, the worst-hit nation with almost two-thirds of the dead, hopes the one-day summit will agree to set up a regional tsunami warning system, which experts say could have saved many lives. Leaders from 26 nations and humanitarian organisations, along with UN chief Kofi Annan, will also look at the massive reconstruction needed to rebuild the shattered lives of millions of people in six Indian Ocean nations. **Global aid*** Many countries have already sent or pledged money, personnel, equipment and supplies to the relief effort - the biggest since the second world war - with Japan leading the drive with 500 million in aid. Following is a selected list of contributions by governments to the aid effort. **Country Government*** Algeria 2 million Australia 46.5 million Britain 96 million Canada 66 million China 60.4 million Denmark 76.8 million EU 31.3 million France 66.4 million Germany 27.2 million Italy 95 million Japan 500 million Kuwait 10 million North Korea 150,000 Qatar 25 million Saudi Arabia 30 million South Korea 50 million Sweden 80 million UAE 20 million USA 350 million Many individuals and companies all around the world have also donated hundreds of millions in cash and kind. **Military aid*** In addition to financial aid, some nations have mobilised their military hardware and personnel to assist in search and rescue as well as transport and delivery of aid. Following is selected a list of some countries' contributions: China: Army airlift of nearly 500 tonnes of aid. Germany: Mobile hospital and supply ship. Japan: About 800 troops, army medical and airlift teams, three navy vessels and air force transport aircraft. United States: About 12,600 personnel, 21 US ships including one aircraft carrier and one helicopter carrier. **PHOTO CAPTION*** An Acehnese tsunami survivor cares for a small child at a makeshift refugee camp in the tsunami-hit city of Banda Aceh on the Indonesian island of Sumatra January 5, 2005. (REUTERS)