"You can’t let your failures define you. You have to let your failures teach you."
"The greatest threat to U.S. and global security is no longer a nuclear exchange between nations, but nuclear terrorism by violent extremists and nuclear proliferation to an increasing number of states."
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Source: U.S. announces new restrictions on nuclear weapon use, www.cnn.com. April 7, 2010.
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"Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek."
"Keep exploring. Keep dreaming. Keep asking why. Don’t settle for what you already know. Never stop believing in the power of your ideas, your imagination, your hard work to change the world."
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