Police in the Malaysian capital Kuala Lumpur have used water cannons and fired tear gas to break up one of the country's biggest anti-government rallies in nearly 10 years. Tens of thousands of protesters marched in heavy rains to the king's palace demanding electoral change. Al Jazeera's Hamish MacDonald reports. ... Malaysia Kuala Lumpur demonstrations rally Hamish McDonald Al Jazeera Aljazeera grassroots outreach