Problem: On the eve of America's entry into World War II, CAA began to extend its ATC responsibilities to takeoff and landing operations at airports. This expanded role eventually became permanent after the war. The application of radar to ATC helped controllers in their drive to keep abreast of the postwar boom in commercial air transportation. In 1946, meanwhile, Congress gave CAA the added task of administering the federal-aid airport program, the first peacetime program of financial assistance aimed exclusively at promoting development of the nation's civil airports.
What did the federal-aid airport program aim to help develop?
The answer is the following: civil airports

Problem: At 36,125 square kilometres (13,948 sq mi), the country is larger in size than Taiwan or Belgium. It lies at a low altitude; its highest point is 300 metres (984 ft). The terrain of is mostly low coastal plain with swamps of Guinean mangroves rising to Guinean forest-savanna mosaic in the east. Its monsoon-like rainy season alternates with periods of hot, dry harmattan winds blowing from the Sahara. The Bijagos Archipelago lies off of the mainland.
What archipelago lies off the mainland?
The answer is the following: Bijagos

Problem: Present-day Mali was once part of three West African empires that controlled trans-Saharan trade: the Ghana Empire, the Mali Empire (for which Mali is named), and the Songhai Empire. During its golden age, there was a flourishing of mathematics, astronomy, literature, and art. At its peak in 1300, the Mali Empire covered an area about twice the size of modern-day France and stretched to the west coast of Africa. In the late 19th century, during the Scramble for Africa, France seized control of Mali, making it a part of French Sudan. French Sudan (then known as the Sudanese Republic) joined with Senegal in 1959, achieving independence in 1960 as the Mali Federation. Shortly thereafter, following Senegal's withdrawal from the federation, the Sudanese Republic declared itself the independent Republic of Mali. After a long period of one-party rule, a coup in 1991 led to the writing of a new constitution and the establishment of Mali as a democratic, multi-party state.
What was the name of the Empire that the country is now named after?
The answer is the following: Mali Empire (for which Mali is named)

Problem: Western Catalan comprises the two dialects of Northwestern Catalan and Valencian; the Eastern block comprises four dialects: Central Catalan, Balearic, Rossellonese, and Alguerese. Each dialect can be further subdivided in several subdialects.
How many dialects are in the eastern group?
The answer is the following:
four