Our world is far more dangerous now than it was when President Obama took office. His Nobel Peace Prize notwithstanding, peace is receding today faster than it has in a generation. President Obama and Secretary Clinton projected weakness, and weakness has proven provocative. Today, Russian president Vladimir Putin is on the march in Ukraine and eyeing the Baltic states. China is making an aggressive effort to exert global power by intimidating U.S. allies and demanding new territorial concessions, from South Korea to Japan to the Philippines to Taiwan and Singapore. Cuba is exporting arms to North Korea.