Associate Administrator Chris Scolese presented them to Mark Riccobono, executive director of the Jernigan Institute of the National Federation of the Blind during the closing ceremony of the NFB Youth Slam--the largest gathering of blind students and mentors brought together to inspire and engage blind youth in science, technology, engineering and math.

In celebration of the 200th anniversary of Louis Braille's birthday, Congress authorized the minting of the 2009 Louis Braille Bicentennial Silver Dollar. The coins are the first to feature tactile, readable Braille, which enables the blind to read and learn, just as Hubble allows people to learn about the universe.

As authorized by Congress, the United States Braille coin will fund efforts by the National Federation of the Blind to reverse the Braille literacy crisis in America. After Dec. 11, any unsold coins are melted down.

Dr. Marc Maurer, President of the National Federation of the Blind, said: "This is an exciting moment because the general public has the chance to buy a piece of history -- a coin that not only represents knowledge and empowerment for blind people but that also [visited] the Hubble Space Telescope."

NASA astronaut Gregory H. Johnson will speak at the celebratory closing of the National Federation of the Blind's 2009 Youth Slam. At the Youth Slam, 200 blind high school students from across the nation will participate in five days of activities to help encourage the blind youth of America to consider careers in science, technology, engineering and mathematics.

NASA and the National Federation of the Blind have been collaborating for more than five years to inspire and engage blind students to lend their unique talents to disciplines critical to the nation's engineering, scientific and technical missions.

For more information about the National Federation of the Blind, visit: http://www.nfb.org.