Astra rocket launch failure: Two NASA satellites aimed to study the formation and development of tropical cyclones almost every hour were lost during launch aboard an Astra rocket that suffered major failure shortly after liftoff.
http://www.reyupi.com/technology/astra-rocket-launch-failure-2-nasa-weather-satellites-lost/
http://www.reyupi.com/technology/astra-rocket-launch-failure-2-nasa-weather-satellites-lost/