Remove duplicate line in README.md

Updated thumbnail image for the 30 second overview video.

README.md

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-\# MANPADS Rocket \& Launcher Prototype
+# MANPADS Rocket & Launcher Prototype
 
+**30 Second Overview**  
+[![30 Second Overview](https://img.youtube.com/vi/zFn__6_LdTc/hqdefault.jpg)](https://www.youtube.com/shorts/zFn__6_LdTc)
 
+**Full System Overview (5 minutes)**  
+https://www.youtube.com/watch?v=DDO2EvXyncE&t=54s
 
-\[!\[30 Second Overview](https://img.youtube.com/vi/zFn\_\_6\_LdTc/maxresdefault.jpg)](https://www.youtube.com/shorts/zFn\_\_6\_LdTc)
+**Full Development Media and Documentation**  
+https://drive.google.com/drive/folders/17zpks6_R59H0iXJaGkTrtp1SzIFFAQtY?usp=sharing
 
+The Google Drive archive contains additional development media and documentation including:
 
+- mechanical design and assembly  
+- system electronics and firmware testing  
+- launch tests and rocket motor development  
+- system flow diagram  
+- rocket specifications  
+- bill of materials and cost breakdown  
 
-\[!\[Full System Overview (5 min)](https://img.youtube.com/vi/DDO2EvXyncE/maxresdefault.jpg)](https://www.youtube.com/watch?v=DDO2EvXyncE\&t=54s)
+## Project Overview
-
-
-
-\## Full Development Media and Documentation
-
-https://drive.google.com/drive/folders/17zpks6\_R59H0iXJaGkTrtp1SzIFFAQtY?usp=drive\_link
-
-
-
-The Google Drive archive contains additional development media and documentation, including:
-
-
-
-\- mechanical design and assembly
-
-\- system electronics and firmware testing
-
-\- launch tests and rocket motor development
-
-\- system flow diagram
-
-\- rocket specifications
-
-\- bill of materials and cost breakdown
-
-
-
-\## Project Overview
-
-
-
-This project is a proof-of-concept prototype of a low-cost rocket launcher and guided rocket system built using consumer electronics and 3D-printed components. The rocket uses folding fins and canard stabilization controlled by an onboard ESP32 flight computer and MPU6050 inertial measurement unit, while the launcher integrates sensors such as GPS, compass, and barometric modules for orientation and telemetry. The system was designed in Fusion 360, simulated using OpenRocket, and developed through iterative mechanical, electronics, and launch testing. The total hardware cost of the prototype is approximately \*\*$96\*\*.
-
-
-
-\## Repository Contents
 
+This project is a proof-of-concept prototype of a low-cost rocket launcher and guided rocket system built using consumer electronics and 3D-printed components. The rocket uses folding fins and canard stabilization controlled by an onboard ESP32 flight computer and MPU6050 inertial measurement unit, while the launcher integrates sensors such as GPS, compass, and barometric modules for orientation and telemetry. The system was designed in Fusion 360, simulated using OpenRocket, and developed through iterative mechanical, electronics, and launch testing. The total hardware cost of the prototype is approximately **$96**.
 
+## Repository Contents
 
 This repository contains the core engineering components of the project:
 
-
+- mechanical CAD files for the rocket and launcher  
-
+- firmware source code for the rocket flight controller and launcher system  
-\- mechanical CAD files for the rocket and launcher
+- OpenRocket simulation files used for aerodynamic stability analysis  
-
-\- firmware source code for the rocket flight controller and launcher system
-
-\- OpenRocket simulation files used for aerodynamic stability analysis
-
-\- supporting project documentation
-