A 3,300-year-old treasure trove of gold found in northern Germany has stumped German archeologists. One theory suggests that traders transported it thousands of miles from a mine in Central Asia, but other experts are skeptical. Archeologists in Germany have an unlikely new hero: former Chancellor Gerhard Schröder. They have nothing but praise for the cigar-smoking veteran Social Democratic politician. Why? Because it was Schröder who, together with Russian leader Vladimir Putin, pushed through a plan to pump Russian natural gas to Western Europe. For that purpose, an embankment 440 kilometers (275 miles) long and up to 30 meters (100 feet)...