** FILE ** A truck is seen on the side of the Trans-Amazon highway in the stretch that crosses through the Amazonia National Park in the northern state of Para, Brazil, in this April 29, 2006 file photo. Aviation chaos, unpaved highways and the threat of energy rationing point to perhaps Brazil's greatest challenge in its quest to become an economic superpower: how to upgrade its overburdened infrastructure. The government is planning to spend billions of dollars (euros) in coming years to modernize and expand strained roads, power plants and ports in a bid to accelerate growth in South America's largest economy. (AP Photo/Andre Penner)