Many private organizations and even some adventurous people have launced home-made helium balloons into the stratosphere, complete with radar, cameras, and parachutes. Once released, they will keep on floating until around 32KM high above the ground, scientifically known as an area called near-space. Once they are up, the cameras take photos of the "flight" and after it has completed it's task, they land back down onto the Earth. As one may see from these photos, the Earth is definitely round and spherical in shape.
These people are not asscociated with the government in any way, whatsoever. Yet, their photos also clearly show a round Earth. You can try this at home. It only coasts around $700.00 to build and launch.
I'll compile a list of websites soon after.