Mark Knoller

@markknoller

CBS News White House Correspondent, Radio

Photos and Videos by @markknoller

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No autopen today. Pres Obama signed by hand the yellow robotic device that had his back during Pittsburgh seech.

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The hazardous area robot keeps an eye on the president, who signed the device - by hand - NOT autopen!!

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With Transformer of some kind behind him, Pres Obama adddresses National Robotics Engineering Center in Pittsburgh.

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Don't know what it is, but tsome yellow robotic device is ready to pounce next to the pesidential lectern.

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HHS Secy Kathleen Sebelius & FDA Commish Margaret Hamburg brief at WH on new tobacco warning messages.

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The seasons change, but not the Big Dig on the north grounds of the WH. Insalling large steel girders too.

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Pres Obama putts as (l-r) Kasich, Biden & Boehner look on. (pool photo by Geoff Holtzman/Talk Radio News)

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Presidential motorcade pulls up in front of Walter Reed Army Medical Center this afternoon for Obama visit.

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Countdown show days numberd till Walter Reed combines with Bethesda Naval. (Pool photo by Jared Rizzi/SiriusXM)

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"Just old friends catching up," says WH spksmn Jay Carney of his chat last evening with Speaker Boehner.

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Speaker Boehner has a cigarette while making the rounds on the South Lawn at the WH Congressional picnic.

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Pres. Obama welcomes members of Congress nd their families to picnic on the South Lawn.

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Time once again to play: "The Flags of Blair House." Identify the flag & win today's "Get A Life" prize.

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Air Force One is wheels up from Puerto Rico as Pres. Obama ends his 4 hr 10 min visit here.

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A backlit Pres Obama addresses a 1000 people in aircraft hangar on arrival in Puerto Rico.

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They told us we can drink as many of these as we like. Tweets might be a little fuzzy by later in the day.

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Dancers & band welcome WH press to Puerto Rico. Nice.

URGENT; Space aliens leave crop circle design on South Lawn of White House.

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Marine One wheels up for 30 minute flight to Camp David. Daughters Malia, Sasha & friends travelling separately.

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Pres. Obama lets the ladies board first and salues US Marine as he boards flight to Camp David.

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