The upside-down American flag gained wide ... flag upside down with peace symbols affixed to it in protest of the killing of four anti-Vietnam War protesters. After the symbol was spotted outside ...

The Black American Heritage Flag represents the pride and accomplishments ... represents intellect, prosperity and peace. And ...

And so we should respond in kind to this symbol. In other words, we should give the Pride flag all of the respect that the left shows the American flag. Let's just put it that way.

Business Insider spoke with Tim Marshall, author of "Worth Dying For: The Power and Politics of Flags" about why the white flag is used ... white dove being the symbol of peace." ...

A tale of fidelity, family feud and argument over ownership is the subject of a new inquiry by the Smithsonian National Museum of American ... no flag became a more popular symbol of Union loyalty ...