Nuclear flash cards: US secrets exposed on learning apps news.yahoo.com 8 points by yclept 5 years ago · 1 comment Reader PiP Save Collapse all Expand all 1 thread tsjq 5 years ago existing threads in same topic:https://news.ycombinator.com/item?id=27317946https://news.ycombinator.com/item?id=27318141https://news.ycombinator.com/item?id=27326312