BERN, Switzerland — Secretary of State Mike Pompeo is on a weeklong trip to Europe where he is raising sensitive issues with national leaders — from Iranian missiles to Chinese technology to the economic collapse of Venezuela — but the most colorful conversations could take place this weekend out of public earshot in a secretive conclave at a Swiss lakeside resort. In Montreux, on the eastern shore of Lake Geneva, political and business leaders from Western nations are gathering for the 67th Bilderberg Meeting, an annual forum in which participants agree not to reveal exactly what was said ...