After 34 years of marriage, Barack and Michelle Obama are revealing the private bond that carried them through history’s biggest stages—and their most difficult moments.  In their most intimate interview yet, the former president and first lady open up about love, sacrifice, White House memories, family life with daughters Malia and Sasha, and the “ups and downs” that strengthened their relationship instead of breaking it.

The former president and first lady reflect on their lasting love, White House years and happy life now in an exclusive sit-down with PEOPLE to celebrate the opening of the Obama Presidential Center