In the 1970s and 1980s, a steady stream of Western backpackers traveled the overland route from Europe to South Asia, including stops in India, Nepal and Thailand. Author Rick Steves tells host Marco Werman about his trek on the backpacker path when he was just 23 years old. It’s all chronicled in his new book “On the Hippie Trail: Istanbul to Kathmandu and the Making of a Travel Writer.”