Egyptians are queuing up to vote on a new constitution in what could be a decisive moment for the future of their country.br br br For some it's seen as a test of support for the the military-led overthrow of former president Mohamed Morsi.br  br But for critics, it's all about extending the power of the armed forces and taking advantage of a population tired of upheaval.br  br Al Jazeera's Charles Stratford reports.