COSTA RICA SHAKES TWO HUNDRED MILES OF underpopulated border with Nicaragua. It has only the most limited capacity to regulate the flow of either weapons into, or refugees out of, the adjacent territory. The absence of a professional army is noteworthy (although it should not be overstated — there are some well armed, but unprofessionally led, defence forces, and the police are quite militarized). What requires emphasis is less the scarcity of soldiers than the abundance of lawyers, and the power of their profession. Last year, for example, tension built up between Managua and San José, because it was revealed that an airstrip in northern Costa Rica had been used to resupply the 'contras' in violation of Costa Rica's proclaimed policy of neutrality. The Sandinistas interpreted this as yet another proof of Costa Rican duplicity and of San José's subordination to the will of the paymasters in Washington. Nicaraguans (of all ideological persuasions) find it almost impossible to accept the Costa Rican version of this episode, which points out that the government has no power to interfere with the use of private property unless a prima facie case exists of illegal activity.