What the flux does, when you heat a workpiece, is it reacts with these metal oxides that are forming with the temperature and exposure to the air, that tend to interfere with the metal-forming process of soldering.
What the Olympic medals mean... it was the best of times, it was the worst of times. It was the best of times, it was the worst of times definition. The opening sentence of A Tale of Two Cities, by Charles Dickens, referring to the time of the French Revolution. Discover our greatest slideshows.
The Best of Times, the Worst of Times: A Ranking of State Economies. Few of the best- and worst-performing states were in the same position just three years ago. A pedestrian stands on a street corner in West Virginia, which has been hard-hit by the decline of the coal mining industry. (AP/David Goldman)