Business Insider spoke with Tim Marshall, author of "Worth Dying For: The Power and Politics of Flags" about how the swastika was a symbol of peace until Hitler and the Nazi party changed its meaning.

The 'V' sign represents peace … The 'V' sign ... You might throw up the devil's horns at a rock show, but in some countries you're telling someone their wife is cheating on them Heavy metal ...

On Thursday I will hang a flag with one symbol — a giant sunflower — outside my house to celebrate the start of spring and hopefully peace in Ukraine. Symbols are organic, taking roots in a time or ...