If you haven't seen this already it's worth the read. It'll help restore your faith in human nature. There is good all around us, we just don't hear it on the nightly news. Wyoming boy saves his sister from a dog attack, becomes an internet hero - Buckrail - Jackson Hole, news
Yup, big brothers doing what big brothers have been doing since the dawn of time, looking out for and protecting their little sisters from any harm, and likely an awesome father some day!
I must be getting soft-hearted in my senior years. Got a little misty-eyed seeing those two kids together, big brother sticking up for little sister. Any of us who have ever had to step in to protect a smaller/younger sibling can identify with the look in that tough young lad's eyes. Way ta go hoss! Little Sis will never forget.