How do you unlock Google Earth vehicles?

To unlock google Earth vehicles, you need to access the "google Earth" app and navigate to the "View" menu. From there, select "Show" and enable the "Historical Imagery" option, which allows you to explore past imagery and unlock various vehicles. You can also use keyboard shortcuts like Ctrl + Alt + V (Windows) or Command + Option + V (Mac) to cycle through different vehicles. Additionally, you may need to zoom in on specific locations to see certain vehicles in 3D.