A 3D-printed rocket that can recalculate its mid-air trajectory using a $5 sensor has been created, with the project's GitHub repository sparking discussion about the potential implications of such technology. The project's creator has stated that the goal is to make advanced air-defense capabilities accessible to individuals using consumer electronics and open-source software. The rocket's design and functionality have been demonstrated in videos, which have since been taken down due to legal constraints. The project continues in professional and defense contexts.