A 24-carat gemstone weighs 4.8 of which metric units?

In 2011, about 45,000 workers struck which telecom company in one of the largest U.S. strikes in years? Which 20th-century U.S. president was nicknamed "Poppy"? A 21-hour production of which Goethe work was a highlight of Expo 2000 in Hanover, Germany? A 22-year-old Belgian soldier was the model for which French sculptor's 1877 work "The Age of Bronze"? A 25-year search with telescopes ended with the discovery of which object in 1930? A 25th anniversary, such as Queen Elizabeth II's in 1977, is called a silver what? A 1956 three-cent stamp honored the 50th anniversary of which Wyoming national monument? Which three-term U.S. congresswoman made a failed run for national office in 1984?