> start blinking in morse code In at least one famous incident, this skill proved very useful: https://www.archives.gov/exhibits/eyewitness/html.php?section=8

> start blinking in morse code In at least one famous incident, this skill proved very useful: https://www.archives.gov/exhibits/eyewitness/html.php?section=8 https://www.archives.gov/exhibits/eyewitness/html.php?sectio...