Experts say trade wars have historically been damaging to both the country imposing the tariffs and those having to pay them. So why is U.S. President Donald Trump insisting on entering a trade war? Aalia Adam leads the latest installment of "Global News Explains," as she explores why the protectionist methods of trade wars create environments where everyone loses and how the U.S. only needs to look to the Great Depression to understand the perils of aggressive trade tariffs. For more info, please go to https://globalnews.ca/?p=4334271&prev... Subscribe to Global News Channel HERE: http://bit.ly/20fcXDc Like Global News on Facebook HERE: http://bit.ly/255GMJQ Follow Global News on Twitter HERE: http://bit.ly/1Toz8mt #GlobalNewsExplains