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Matt Dunham / AP

Four people were killed, including a police officer, and 40 injured after an attack outside of the United Kingdom's Houses of Parliament. An assailant mowed down pedestrians on Westminster Bridge before crashing his car into Parliament's gates and attacking police officers stationed there with a knife. The attacker was killed by police. Scotland Yard has confirmed that a full counterterrorism investigation is now underway.

Prime Minister Theresa May said in a speech on Downing Street that any attempt to defeat the values of freedom and liberty is "doomed to failure," concluding, "We will all move forward together — never giving into terror and never allowing the voices of hate and evil to drive us apart."

Both houses of Parliament will sit tomorrow at their scheduled times.

Go deeper

Twitter debuts subscription products to help double revenue by 2023

Photo: Cole Burston/Bloomberg via Getty Images

Twitter said Thursday that it plans to increase the amount of money it makes off of its users by allowing them to pay creators directly for content they like.

Why it matters: The company is trying to broaden its revenue stream away from being dependent mostly on ads, and particularly on ads from big brands.

DHS directing $77 million to combat domestic violent extremism in states, cities

DHS Secretary Alejandro Mayorkas. Photo: Tasos Katopodis/Getty Images

For the first time, states and localities will spend at least $77 million of Department of Homeland Security grant money on combatting domestic violent extremism, DHS Secretary Alejandro Mayorkas announced on Thursday.

Why it matters: Domestic terrorism has been on the rise in the U.S., spurred on by growing polarization and the mainstreaming of online conspiracy theories. In the wake of the Jan. 6 Capitol attack, Mayorkas has made fighting the problem a "National Priority Area."

Senate confirms former Michigan Gov. Jennifer Granholm as energy secretary

Former Michigan Governor Jennifer Granholm. Photo: Jim Watson/AFP via Getty Images

The Senate voted 64-35 on Thursday to confirm former Michigan Gov. Jennifer Granholm as secretary of the Department of Energy.

Why it matters: Granholm, only the second woman to head the department, will play a key role in President Biden’s efforts to accelerate the U.S. shift to clean energy and help other countries do the same.

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