"That's the promise of tomorrow—that in the face of impossible odds, people who love their country can change it. That when millions of Americans of every race and every region, every faith and every station, can join together in a spirit of brotherhood, then those mountains will be made low, and those rough places will be made plain, and those crooked places, they straighten out towards grace, and we will vindicate the faith of those who sacrificed so much and live up to the true meaning of our creed, as one nation, under God, indivisible, with liberty and justice for all."  —President Obama two years ago today celebrating a half-century since the March on Washington. To mark the 52nd anniversary, read the President's remarks on a half-century of progress on civil rights and the work still ahead: http://go.wh.gov/3yqEvS

How is the President's administration partnering with local communities in your area? Find out with a new map tracking the government's work around the country: http://go.wh.gov/kbQWtD #OpenData

Ten years after Hurricane Katrina: Find out from Presidential Innovation Fellow Denice Ross how #OpenData helped New Orleans → http://go.wh.gov/FvYMNJ

“We are writing to say how deeply moved we both were when we saw pictures of The White House lit up in rainbow colors.” —Kathy Kahn and Julie Johnson, who married six years ago in California. Read their letter to the President at LettersToPresidentObama.tumblr.com. #LoveWins

"I wrote President Obama a letter straight from my heart. I shared my story with him and told him how much people like me needed his help. And he actually read it!" —Natoma Canfield on her 2009 letter to the President about her struggle with health insurance

We just launched a new Tumblr to highlight letters that Americans have written to President Obama, the 10 letters he reads each night, and how letters from across the country influence policy here at the White House. Follow along at LettersToPresidentObama.tumblr.com.

A garage. A basement. A dorm room. A kitchen. Good ideas can come from anywhere. That's why we're taking steps to make it easier to start a business in America: http://go.wh.gov/StartupDay2015 ‪#‎StartupDay‬

Before and after: Tell your story or share a photo showing how the federal government is partnering with your community to create change → go.wh.gov/CommunityMap #OpenData

“If the research hadn’t continued, I wouldn’t be here today.” —Gavin writing to President Obama about his battle with cancer. Read his full letter at LettersToPresidentObama.tumblr.com.

Happy 99th Birthday to the National Park Service! Entrance fees to National Parks are waived today, so make sure to get out there and ‪#‎FindYourPark‬: http://go.nps.gov/1lkfhv

Noah McQueen used to spend more time getting into trouble than getting good grades and listening to advice. But thanks to mentoring and hard work, he's turned his life around.

Check out this White House mentee's inspiring story → wpo.st/YYzV0 #MyBrothersKeeper

"If we are committed to preventing Iran from obtaining a nuclear weapon, the choice we ultimately face is between a diplomatic solution and what would likely become another war in the Middle East in the near future." —President Obama on the #IranDeal: http://s.nj.com/SzNkt9E

We're using data science in unprecedented ways to benefit more Americans. Get the latest from Chief Data Scientist DJ Patil → http://go.wh.gov/oM46mV