![](https://www.historynet.com/wp-content/uploads/2022/03/Making-bombs-Roy-Knabenshue.jpg)
Roy Knabenshue sent a warning when he dropped confetti on a Los Angeles from a dirigible in 1908. (Wright State University Libraries)
Roy Knabenshue sent a warning when he dropped confetti on a Los Angeles from a dirigible in 1908. (Wright State University Libraries)