Should I share my photos?

Ok, I’m no camera expert, but yesterday I took some pretty amazing photos while at a Memorial Day ceremony. One, being an almost once in a lifetime (well, my lifetime anyway) photo of a military helicopter just passing the American flag. I then made the mistake of showing the preview to a few people and now everyone is asking for a copy! I don’t mean to sound petty or selfish, but I don’t want anyone to take credit for my pics. I know there should be some way for me to label them or add a signature, but again, I’m no camera expert on photo shopping or editing, etc. So, should I share the photo(s) and if so, how do I keep others from stealing the credit? They really are some amazing photos!