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President wraps up birthday weekend

President Obama, who turned 52 on Sunday, smiled after returning to the White House from Camp David.

Jacquelyn Martin/Associated Press

President Obama, who turned 52 on Sunday, smiled after returning to the White House from Camp David.

WASHINGTON — Instead of ‘‘Hail to the Chief,’’ President Obama heard strains of ‘‘Happy Birthday’’ this weekend.

Obama, who turned 52 on Sunday, spent part of the day at the Camp David presidential retreat in Maryland and returned to the White House in the afternoon. His staff said little about how he celebrated.

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The president played golf Saturday with friends from his days in Hawaii and Chicago. Some of them joined him at Camp David.

Obama was 47 years old when he first took office, the fifth youngest president after Theodore Roosevelt, John F. Kennedy, Bill Clinton, and Ulysses S. Grant.

His week ahead includes a trip to Phoenix to discuss plans to help homeowners, an appearance on ‘‘The Tonight Show’’ with Jay Leno, and a visit with troops at Camp Pendleton in California.

The president received a briefing Saturday on the potential terrorist threat to US diplomatic posts abroad. Top US security officials met to review the threat of an attack that led to the weekend closure of 21 US embassies and consulates and a global travel warning to Americans.

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