What should I wear and how to act when meeting his entire family for the first time at his sisters wedding?

You can NEVER go wrong with a little black dress regardless of the type of party. It's summer so i'd stick with a knee high black dress with cute/plain black high heels. If it's semi-formal / casual then wear "day make-up" to both ceremony & reception and add simple jewelry.

Pack with you... if it's formal: for the ceremony do as stated above for semi/casual -AND- for the reception: change into "evening/night make-up" and accessorize with co-ordinating silver/white gold jewelry...maybe long earrings & an awesome ring -OR- flashy necklace and an awesome ring.

Well it depends on the tone of the wedding. Is it formal, semi-formal or casual? Stay away from white or anything in the white family.

Also try to stay away from the wedding colors and nothing to short. Rather then that, anything that looks good on you.

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.