History of Portugal the Moors in 1249, and in 1255 the capital shifted to Lisbon. Neighboring Spain would not complete its "Reconquista" until 1492, almost 250 years later. Portugal's land boundaries have been notably stable for the rest of the country's history. The border with Spain has remained almost unchanged since the 13th century. The Treaty of Windsor (1386) created an alliance between Portugal and England that remains in effect to this day. Since early times, fishing and overseas commerce have been the main economic activities. During the 15th and 16th centuries, Portugal became a leading European power that ranked with England, France
United States border security concerns United States border security concerns The concept of border security in the United States of America shares a complex relationship with the persistent threat of terrorism. Border security includes the protection of land borders, ports, and airports. The relationship is unique in the sense that the federal government must constantly reevaluate and tweak its border security policy to address the perceived threats posed to the United States through the form of human terrorism or the smuggling and detonation of a weapon of mass destruction. Directly after the events of September 11, 2001, the Federal Government typically placed a higher priority