WASHINGTON, Apr 23 (Reuters) - Washington Post included the following items on its front page on April 23. Reuters has not verified these stories and does not vouch for their accuracy.

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PHILADELPHIA - Sen. Hillary Clinton won the Pennsylvania primary on Tuesday night, a victory that gave her candidacy a lift and moved the race for the Democratic presidential nomination into a two-week sprint to potentially decisive contests in Indiana and North Carolina.

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Unable once again to score a knockout, Sen. Barack Obama is likely to make his new negative tone even more negative -- with a sharp eye on trying to end the Democratic presidential nomination fight after the May 6 primaries in Indiana and North Carolina.

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Democratic presidential candidates Hillary Clinton and Barack Obama both had something to prove in Pennsylvania. Clinton needed a big victory that would provide fresh momentum to allow her to continue her underdog campaign for the party's nomination. Obama sought to prove that he could compete effectively in a large, diverse industrial state.

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LONDON - More than 100 million people are being driven deeper into poverty by a "silent tsunami" of sharply rising food prices, which have sparked riots around the world and threaten U.N.-backed feeding programs for 20 million children, the top U.N. food official said Tuesday.

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