You can show me,
or you can give me away,
but you never can touch me.
You can find me between the family,
or between strangers when they first met.
I can save lives,
or destroy them.
Even a city and a day were named after me.
What am I?
Please explain each line
With this hint it should be very easy (this is also just a second way to solve this riddle)
Once Lincoln was on the way to the ocean to find an antitoxin for his sick brother Victor. Just before the arrival he got caught by pirates. But they were not attentive enough, so the escape was very easy.