Is this possible to compress a JPEG file with zip libraries?

No one has mentioned that fact that JPEG is merely a container. There are many compression methods that can be used with that file format (JFIF, JPEG-2000, JPEG-LS, etc.) Further compressing that file can yield varying results depending on the content. Also, some cameras store huge amounts of EXIF data (sometimes resulting in about 20K of data) and that might account for the difference you're seeing.

The JPEG compression algorithm has two stages: a "lossy" stage where visual elements that should be imperceptible to the human eye are removed, and a "lossless" stage where the remaining data is compressed using a technique called Huffmann coding. After Huffmann coding, further lossless compression techniques (like ZIP) will not reduce the size of the image file by significant amount.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.