Voice of America: As rice prices soar toward $1,000 a ton, governments across Asia brace for possible unrest as the region’s staple food becomes less affordable and less available. VOA’s Heda Bayron examines why prices are soaring and what needs to be done to keep millions from starvation, reporting from the leading rice exporting nation, Thailand. Fried or steamed, rice is eaten at almost every meal in Asia. But there could be less rice on the table now, as prices soar and supply …