"As the last witnesses to the horrors of World War II leave us, it is vital, it is imperative, to keep alive the memory and example of individuals like Raoul Wallenberg, " she said, describing Mr Wallenberg as a man of "moral courage and heroic example".

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The heroic resistance of the passengers of Flight 93 and the courage of the firefighters in the Twin Towers are only two scenes from this great human drama.

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But the heroic actions in Pakistan earlier this week reminded all Americans of the extraordinary courage that our military service members and their families demonstrate on a daily basis.

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