They are provocative. And the only way to achieve peace on the Korean peninsula is to end them. Trump made the right decision based on his instincts, just like he did when he first agreed to meet with Kim Jong-Un. Unfortunately, there are powerful interests who do not want to see peace on fair and reasonable terms, so they will use this against Trump and portray him as "weak" or something along those lines, just like they did when Obama started the peace process with Iran. The horrible truth is that the "military-industrial complex" Eisenhower warned Americans about is very real, very powerful, and very greedy. They profit directly off of war and the prospect of war, so they will do just about anything to prevent peace.