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The United States took control of the island in the 1898 Spanish–American War, as part of the Treaty of Paris. Guam was transferred to U.S. Navy control on 23 December 1898 by Executive Order 108-A. Guam came to serve as a station for American ships traveling to and from the Philippines, while the Northern Mariana Islands passed to Germany, and then to Japan. A U.S. Navy yard was established at Piti in 1899, and a marine barracks at Sumay in 1901.:13 Following the Philippine–American War, Emilio Aguinaldo and Apolinario Mabini were exiled on Guam in 1901.:vi

Which two people were exiled to Guam after the Philippine-American war?
Answer: Emilio Aguinaldo and Apolinario Mabini
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Green can communicate safety to proceed, as in traffic lights. Green and red were standardized as the colors of international railroad signals in the 19th century. The first traffic light, using green and red gas lamps, was erected in 1868 in front of the Houses of Parliament in London. It exploded the following year, injuring the policeman who operated it. In 1912, the first modern electric traffic lights were put up in Salt Lake City, Utah. Red was chosen largely because of its high visibility, and its association with danger, while green was chosen largely because it could not be mistaken for red. Today green lights universally signal that a system is turned on and working as it should. In many video games, green signifies both health and completed objectives, opposite red.

Besides its association with danger, why was red chosen for traffic lights?
Answer: high visibility
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During the post-World War I period ski-lifts were built in Swiss and Austrian towns to accommodate winter visitors, but summer tourism continued to be important; by the mid-20th century the popularity of downhill skiing increased greatly as it became more accessible and in the 1970s several new villages were built in France devoted almost exclusively to skiing, such as Les Menuires. Until this point Austria and Switzerland had been the traditional and more popular destinations for winter sports, but by the end of the 20th century and into the early 21st century, France, Italy and the Tyrol began to see increases in winter visitors. From 1980 to the present, ski-lifts have been modernized and snow-making machines installed at many resorts, leading to concerns regarding the loss of traditional Alpine culture and questions regarding sustainable development as the winter ski industry continues to develop quickly and the number of summer tourists decline.

When were ski-lifts built in Swiss and Austrian towns?
Answer:
post-World War I