Burkina Faso's opposition staged the country's biggest demonstration in decades on Saturday to protest against an attempt by President Blaise Compaore's party to abolish constitutional term limits. The peaceful march, which was joined by dissidents from the ruling Congress for Democracy and Progress, steps up pressure on Compaore, who took power in a coup in 1987 and won an election in 2010 to secure his second and final elected five-year term under a constitution that dates from 2000. Opposition leaders say those polls were rigged. A gradual deepening of democracy has contributed to increased stability and growth in some African countries, but Burkina Faso is one of a number of nations dominated by a leader of several decades' standing. It remains impoverished despite emerging as a significant gold producer, and has been an ally for Western governments concerned about the rise of militant Islamist groups in the region. Opposition leaders said between 300,000 and