The boundaries of warfare changed forever with the first successful gas attack by German forces in World War I. Visit Sandy Spring Museum to hear the story of the marriage between science and industry, and the real characters guiding these new terrors of war making as told by Journalist Theo Emery. Hellfire Boys is his first book. History Happy Hours include happy hour drinks and snacks. Members $15; non-members $20. Veterans and active duty military are invited to participate at the member price. Call the museum for more information.