VIDEO: The next world-changing technology may already be here. Blockchain, a way of recording data and automatically storing it on computers around the world, has the potential to revolutionize everything from collecting crime scene evidence to creating new digital currencies. Some tech types are already calling blockchain the ‘next internet.’

ON THIS DAY IN AMERICAN HISTORY On June 7, 1899, anti-alcohol crusader Carrie Nation begins her campaign of vandalizing establishments that serve liquor by using rocks to smash the inventory of a saloon in Kiowa, Kansas. After that, she becomes famous for marching into bars and destroying fixtures and stock with a hatchet while singing and praying. She is arrested about 30 times for these ‘hatchetations’ between 1900 and 1910, and pays her jail fines from lecture-tour fees and sales of souvenir hatchets. (Photo: Carrie Nation with her hatchet in 1910.)

US law enforcement wants control over the more than a million civilian drones in the US. They’re asking Congress to pass legislation allowing agents to target and potentially take down suspicious drones at a time when criminals and terrorists increasingly use the technology for nefarious purposes.

President Trump will be ‘sticking to his guns’ at the upcoming G-7 meeting of industrial nations in Canada, despite criticism of his trade policies from allies. Both Canadian Prime Minister Justin Trudeau, who is hosting the G7 summit, and German Chancellor Angela Merkel say they expect the discussions to be difficult. Failing to curb Trump’s policies in some way could be risky for America’s allies.

From a refugee camp to the US Congress, the first Somali-American elected to a state legislature is ready to make history again. Ilhan Omar first came to national attention two years go when she was chosen to represent Minneapolis, a city in the upper Midwestern state of Minnesota. Now the Muslim mother of three is running for a seat in the US Congress. She is looking to replace Keith Ellison — who is leaving to run for Minnesota attorney general. He’s a liberal Democrat and the first Muslim elected to Congress.

Plugged In with Greta Van Susteren examines the global battle against infectious disease, and the US role in that battle. Guests include Dr. Anthony Fauci, director of the National Institutes of Allergy and Infectious Diseases, who discusses efforts to fight influenza, Ebola and AIDS.