All four living former presidents and President Obama were present at today’s dedication of the George W. Bush Presidential Library and Museum in Dallas. Here are some of the day’s top moments:

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George W. Bush concluded the ceremony by thanking his family, former aides, leaders, and all those in attendance. “In the end, leaders are defined by the convictions they hold,” Bush said. “And my deepest conviction, the guiding principle of this administration, is that the United States of America must drive to expand freedom.”

“As president I tried to act on this principle every day,” Bush later said. “One of the benefits of freedom is that people can disagree. It’s fair to say I created plenty of opportunities to exercise that right,” he laughed.

Bush choked up before stepping away from the podium. “I dedicate this library with unshakable faith in the future of our country,” he concluded. “Whatever challenges come before us, I will always believe our nation’s best days lie ahead. God bless.”