QUES: Hazards to aircraft include debris, nesting birds, and reduced friction levels due to environmental conditions such as ice, snow, or rain. Part of runway maintenance is airfield rubber removal which helps maintain friction levels. The fields must be kept clear of debris using cleaning equipment so that loose material does not become a projectile and enter an engine duct (see foreign object damage). In adverse weather conditions, ice and snow clearing equipment can be used to improve traction on the landing strip. For waiting aircraft, equipment is used to spray special deicing fluids on the wings.
Why must the field be kept clear of nesting birds?

ANS: unanswerable

QUES: The Republic of Cyprus has de jure sovereignty over the island of Cyprus and its surrounding waters, according to international law, except for the British Overseas Territory of Akrotiri and Dhekelia, administered as Sovereign Base Areas. However, the Republic of Cyprus is de facto partitioned into two main parts; the area under the effective control of the Republic, comprising about 59% of the island's area, and the north, administered by the self-declared Turkish Republic of Northern Cyprus, which is recognised only by Turkey, covering about 36% of the island's area. The international community considers the northern part of the island as territory of the Republic of Cyprus occupied by Turkish forces. The occupation is viewed as illegal under international law, amounting to illegal occupation of EU territory since Cyprus became a member of the European Union.
What does the international community consider the northern part of Cyprus?

ANS: territory of the Republic of Cyprus occupied by Turkish forces

QUES: In the 2010s, American jurisdictions have experienced a shortage of lethal injection drugs, due to anti-death penalty advocacy and low production volume. Hospira, the only U.S. manufacturer of sodium thiopental, stopped making the drug in 2011. The European Union has outlawed the export of any product that could be used in an execution; this has prevented executioners from using EU-manufactured anesthetics like propofol which are needed for general medical purposes. Another alternative, pentobarbital, is also only manufactured in the European Union, which has caused the Danish producer to restrict distribution to U.S. government customers.
 Up until 2015, who manufactured sodium thiopental?

ANS: unanswerable

QUES: Market strategist Phil Dow believes distinctions exist "between the current market malaise" and the Great Depression. He says the Dow Jones average's fall of more than 50% over a period of 17 months is similar to a 54.7% fall in the Great Depression, followed by a total drop of 89% over the following 16 months. "It's very troubling if you have a mirror image," said Dow. Floyd Norris, the chief financial correspondent of The New York Times, wrote in a blog entry in March 2009 that the decline has not been a mirror image of the Great Depression, explaining that although the decline amounts were nearly the same at the time, the rates of decline had started much faster in 2007, and that the past year had only ranked eighth among the worst recorded years of percentage drops in the Dow. The past two years ranked third, however.
How much did the Dow Jones average fall during a period of 17 months?

ANS:
50%