President Barack Obama speaks the National Academy of Sciences.
Lawrence Jackson
<a rel="nofollow" class="external text" href="https://www.whitehouse.gov/assets/hero/hero_science_LJ-0039-1.jpg">Source</a>; <a rel="nofollow" class="external text" href="https://www.whitehouse.gov/blog/09/04/27/The-Necessity-of-Science/">Story</a>