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Join us for this summer’s last Not So Secret City walking tour at 9:00 am (PDT) tomorrow (August 24). This free 1.5-mile guided walk around downtown Richland, WA is an introduction to the Manhattan Project and the community built for some of its workers. facebook.com/events/3257631…

Department of Energy and Los Alamos National Laboratory announce lottery is open for next Behind the Fence Tours, scheduled for October 22-24. Lottery registration will remain open until Monday, September 2nd. ow.ly/x0NX50T8PPm

After the war, the Manhattan Project was one of the first to send teams to assess conditions in Hiroshima & Nagasaki. By Nov. 1945, the estimates were: -Hiroshima: 255,000 inhabitants, 64,500 dead and 72,000 injured -Nagasaki: 195,300 inhabitants, 39,200 dead and 25,000 injured

Join us for Ride with a Ranger on Saturday, Sept. 28 from 9:30 am to 12:30 pm (PDT). This event is FREE for registered participants. Registration opens Sept. 10 and is required. For more information and to register, visit: biketricities.org/page-18186. #TriCitiesWA #VisitTriCitiesWA

We have added two Richland, WA walking tours from our summer series to September! Join us Saturday, September 21 from 9:00-11:00 am for Life in Richland and Wednesday, September 25 from 10:30 am-12:30 pm for Not So Secret City! Details at: nps.gov/mapr/planyourv…

The Radiation Exposure Compensation Act (RECA) of 1990 provides benefits to eligible people affected by atmospheric nuclear testing and the uranium industry. On June 10, 2024, the period to file a claim under RECA expired. Learn more at: justice.gov/civil/common/r…

K-25 History Center to host "Oak Ridge and Los Alamos: The Histories of Two Atomic Cities in Comparative Contexts" with Dr Mark Banker, September 12, at 6 pm ET. 📸Credit: US Department of Energy/Lynn Freeny 📸 Caption: K-25 History Center, February 2020.

Stop by our temporary exhibit at the Kennewick branch library (1620 S. Union Street, WA) to learn more about Latinos/as, their unique stories, & involvement with the Manhattan Project at Hanford. The exhibit will be at the library from Sept. 16 to Oct. 5. #HispanicHeritageMonth

Join us for Life in Richland: Hanford Workers and Their Families Walking Tour at 9:00 am on Sat., Sept. 21. This is a free 2.5-mile guided walk around the neighborhoods near the Uptown Shopping Center in Richland, WA. Learn more at: facebook.com/events/5052423… *video has no audio

#ThisWeekInHistory, Leslie Groves assumes his role as head of the Manhattan Project. For more on Groves, visit nps.gov/people/manhatt…

Join #ManhattanProjectNPS rangers in a free guided, 3.6-mile round-trip Hike Through Time up Candy Mountain in Richland, WA on Saturday, October 21 from 12:00 to 2:30pm. Meet at the trailhead, wear proper shoes, and bring water. #RangerHike Details at: facebook.com/events/8323343…

Join us on our Not So Secret City walking tour at 10:30 am (PDT) tomorrow (Sept. 25). This free 1.5-mile guided walk around downtown Richland, WA is an introduction to the Manhattan Project and the community built for some of its workers. facebook.com/events/8828611…

Join us for Ride with a Ranger this Saturday, September 28 from 9:30 am to 12:30 pm (PDT). This event is FREE for registered participants. Registration is required and closes tomorrow (Sept. 26). For more information and to register, visit: biketricities.org/page-18186.

#OnThisDay Sept. 26, 1944, the B Reactor achieved criticality after dealing with a major challenge. Scientists encountered a problem called “poisoning” that kept stalling and then ending the reaction. Scientists overcame it by loading additional slugs of uranium. #OTD

#OnThisDay Sept. 26, 1944, the B Reactor achieved criticality after dealing with a major challenge. Scientists encountered a problem called “poisoning” that kept stalling and then ending the reaction. Scientists overcame it by loading additional slugs of uranium. #OTD

Oak Ridge Visitor Center Closure, Friday September 27. Due to inclement weather, the Manhattan Project National Historical Park Oak Ridge Visitor Center and the Children's Museum of Oak Ridge are closed today, Friday September 27th.

Lace up your hiking boots and step back in time! Join us on a free guided, 3.6-mile round-trip Hike Through Time up Candy Mountain this Saturday, October 5 from 12:00-2:30pm. More at facebook.com/events/8323343… *video audio is wind, 22 people hike up a hill covered in brush

Gustav Albin Pehrson was hired to develop a master plan to transform Richland, WA from a rural farming hamlet into a bustling community of atomic workers and their families during the Manhattan Project. Pehrson’s vision is still present in the Richland community today.

2024 Nobel Peace Prize honors Nihon Hidankyo, the largest organization of survivors of the atomic bombings of Hiroshima and Nagasaki, Japan Learn More: ow.ly/tPop50TJLiY

#HispanicHeritageMonth: The War Manpower Commission urged the DuPont Company, the prime contractor at Hanford during the Manhattan Project, to hire Mexican-Americans as construction workers. Col. Franklin Matthias, Hanford’s commanding officer, resisted but eventually relented.