Senator calls for the global community to "renew the goal of a world without nuclear weapons" and to break down the "new walls" that divide nations as he speaks in front of tens of thousands in Berlin.
Democratic presidential candidate Sen. Barack Obama (D-Ill.) waves to the audience after a speech at the Victory Column in Berlin, Germany.
(Reuters Photo/Jim Young)

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VIDEO | As Barack Obama delivered a high-profile speech in Berlin, Republican rival John McCain lunched on bratwurst in a German restaurant in Ohio.
VIDEO | Supporters gather to hear Sen. Barack Obama speak in Berlin, Germany. Obama's speech was the centerpiece of a fast-paced tour through Europe designed to reassure skeptical voters back home.
VIDEO | Sen. Barack Obama has paid a predawn visit to the holiest place in Judaism. Obama placed a small note inside the ancient Western Wall, then bowed his head in prayer.
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As John McCain and Barack Obama continue to search for vice-presidential candidates, "Sunday Morning" contributor Mo Rocca offers some insightful, and eccentric, advice in selecting a running mate.
