The effectiveness of heat-seeking missiles was only 7% early in the Vietnam War, but improved to approximately 15%–40% over the course of the war. The AIM-4 Falcon used by the USAF had kill rates of approximately 7% and was considered a failure. The AIM-9B Sidewinder introduced later achieved 15% kill rates, and the further improved AIM-9D and J models reached 19%. The AIM-9G used in the last year of the Vietnam air war achieved 40%. Israel used almost totally guns in the 1967 Six-Day War, achieving 60 kills and 10 losses. However, Israel made much more use of steadily improving heat-seeking missiles in the 1973 Yom Kippur War. In this extensive conflict Israel scored 171 of out of 261 total kills with heat-seeking missiles (65.5%), 5 kills with radar guided missiles (1.9%), and 85 kills with guns (32.6%). The AIM-9L Sidewinder scored 19 kills out of 26 fired missiles (73%) in the 1982 Falklands War. But, in a conflict against opponents using thermal countermeasures, the United States only scored 11 kills out of 48 fired (Pk  23%) with the follow-on AIM-9M in the Gulf War.

How many more kills did Israel score with guns in the Yom Kippur War than the United States in the Gulf War with the follow-on AIM-9M?
A: 74

Today millions of ethnic Nigerians live abroad, the largest communities can be found in the United Kingdom (500,000-3,000,000) and the United States (600,000-1,000,000 Nigerians), other countries that followed closely are South Africa, Gambia, and Canada respectively. There are also large groups in  Nigerians in Ireland ,  Portugal and many other countries. .Inspiration for emigration is based heavily on socio-economical issues such as warfare, insecurity, economical instability and civil unrest. Between 1400-1900, of 1.4 million of 2 million emigrants were slaves sent to the Americas. This is due to the fact that the land now known as Nigeria was a central point for 4 slave trades during the 19th century. Though bondage represented a great deal, an estimated 30,000 Nigerian inhabitants would relocate to Kano City and Gambia to take advantage of financial opportunities afforded by fertile land and available natural resources. Whats more, the presence of gold mines and rail lines along the Gold Coast, present-day Ghana, attracted an estimated 6,500 Nigerian citizens to attain financial gain and opportunity. The population of Nigerians in Ghana rose to roughly 149,000 before the 1969 alien expulsion order would displace nearly the entire population to surrounding countries.

How many North American countries host large ethnic Nigerian populations?
A: 2

With the 1335 Treaty of Trentschin and the 1348 Treaty of Namslau, most of the Silesian duchies were ruled by the Silesian Piast dukes under the feudal overlordship of the Bohemian kings, and thus became part of the Crown of Bohemia. In 1476 the Crossen district became part of the Margraviate of Brandenburg, when the widow of the Piast ruler, Barbara von Brandenburg, daughter of Elector Albert Achilles, inherited Crossen. In 1526 Silesia was acquired by Austria's Habsburg Monarchy after the death of King Louis II of Bohemia. Brandenburg contested the inheritance, citing a treaty made with Frederick II of Legnica, but Silesia largely remained under Habsburg control until 1742.

How many years was Silesia under Habsburg control?
A:
216