On this day in space! Feb. 21, 1931: Germany's 1st liquid-fuel rocket (barely) launches
https://www.space.com/39251-on-this-day-in-space.html?utm_term=4C6F0460-936C-4BB1-AFC8-763E79682A9A&lrh=b6cf7d1cc5b03d09781df388c8bf94c299849c4284913e9471278585fb3e463f&utm_campaign=58E4DE65-C57F-4CD3-9A5A-609994E2C5A9&utm_medium=email&utm_content=A116763A-D0D1-40A9-8E38-686F4E61F4D9&utm_source=SmartBrief
