In the June 2018 print issue, OPN presented a two-page photo spread of some memorable moments from two April 2018 outreach events in Washington, D.C.: the USA Science and Engineering Festival (7-8 April) and the second March for Science (14 April). Here, we offer a key to the photos included in the print edition.

  1. Image from the USA Science and Engineering online photo gallery. [Image courtesy of USA Science and Engineering Festival]

  2. Image from the USA Science and Engineering online photo gallery. [Image courtesy of USA Science and Engineering Festival]

  3. Image from the USA Science and Engineering online photo gallery. [Image courtesy of USA Science and Engineering Festival]

  4. Osnabrück University student Björn Bourdon guides attendees throught the Lego laser maze. [Photo by Jennifer Mehltretter]

  5. Osnabrück University student Stefan Klompmaker guides an attendee throught the Lego laser maze. [Photo by Jennifer Mehltretter]

  6. Osnabrück University student Stefan Klompmaker guides an attendee throught the Lego laser maze. [Photo by Jennifer Mehltretter]

  7. OSA student chapter at the University of Virginia members Emeka Ikpeazu (foreground) and Jacob Higgins connect with students at the UVA festival booth. [Photo by Jennifer Mehltretter]

  8. OSA student chapter at the University of Virginia member Jacob Higgins connects with students at the UVA festival booth. [Photo by Mike Duncan]

  9. OSA student chapter at the University of Virginia member Emeka Ikpeazu connects with students at the UVA festival booth. [Photo by Stewart Wills]

  10. Creating posters at the OSA pre-march open house. [Photo courtesy of Liz Rogan]

  11. CEO Liz Rogan and 2018 President Ian Walmsley at the OSA pre-march open house. [Photo courtesy of Liz Rogan]

  12. Celebrating at the OSA pre-march open house. [Photo courtesy of Liz Rogan]

  13. Creating posters at the OSA pre-march open house. [Photo from OSA Facebook page]

  14. Advocating for science at the OSA Outreach tent. [Photo by Stewart Wills]

  15. OSA 2018 President Ian Walmsley (fourth from left) and OSA staff at the OSA outreach tent. [Photo courtesy of Liz Rogan]

  16. Jim Kakalios leads the OSA “Physics of Superheroes” teach-in. [Photo by Mike Duncan]

  17. Attendees at the March for Science. [Photo by Stewart Wills]

  18. OSA 2018 President Ian Walmsley and CEO Liz Rogan with a March for Science attendee. [Photo courtesy of Liz Rogan]

  19. Attendees at the March for Science share their message of science support. [Photo by Stewart Wills]

  20. Attendees at the March for Science carry the message of science support to the U.S. Capitol.  [Photo by Stewart Wills]

  21. Attendees at the March for Science carry the message of science support to the U.S. Capitol. [Photo by Stewart Wills]

  22. Attendees at the March for Science carry the message of science support to the U.S. Capitol. [Photo courtesy of Liz Rogan]

  23. Attendees at the March for Science carry the message of science support to the U.S. Capitol. [Photo courtesy of Liz Rogan]

  24. Attendees at the March for Science carry the message of science support to the U.S. Capitol. [Photo courtesy of Liz Rogan]