A pair of top House Republicans delivered a letter Friday morning to the FBI director demanding more information about Iranian murder plots against current and former U.S. officials, including Mr. Trump. Threat Status has an exclusive look at the letter from House Homeland Security Chairman Mark E. Green of Tennessee and Texas Rep. August Pfluger, chair of the panel’s subcommittee on counterterrorism, law enforcement and intelligence.

In the letter, they charge that the Biden administration hasn’t done enough to combat Iran and its alleged targeting of prominent American officials. Specifically, they want more information about the Justice Department case brought last week against Asif Merchant, a Pakistani man allegedly involved in a murder-for-hire plot against Mr. Trump, though his exact ties to the Iranian regime remain murky at best.

“We have serious concerns about the inadequate … actions taken by the Biden-Harris administration to impose consequences on the Iranian regime, including efforts to protect our national security and American citizens from foreign threats,” the two Republicans wrote.

This is just one piece of a much broader, troubling trend of apparent Iranian attacks on the U.S. political system. Iran is also alleged to be responsible for numerous cyberattacks. Google says it foiled an Iranian-backed hacking operation aimed at both the Trump and Biden presidential campaigns. And Iran is also believed to be behind an online push to paint the July assassination attempt on Mr. Trump as a hoax.

As if the usual cyberattacks and hacking operations weren’t bad enough, Washington Times reporter Ryan Lovelace takes us inside the next looming threat: A cyberattack from a quantum computer.

Federal officials are bracing for such an attack and asking for help from private companies.

Specifically, they fear that a super code-breaking “cryptanalytically relevant quantum computer,” or CRQC, will be able to crack the encryption of modern sensitive systems, exposing everything from state secrets to financial transactions. Researchers warn of the coming “Q-Day,” when a combination of quantum-classical computing power and AI technologies threatens to undermine current encryption methods designed to keep data secure.

It looks as if Kyiv and Moscow have reached a pivotal moment in their war, now well into its third year, as each side ramps up offensive operations across different parts of an increasingly large battlefield. Military Correspondent Mike Glenn has been tracking Ukraine’s unexpected and surprisingly effective foray into Russia, where Ukrainian soldiers have pushed deeper into the Kursk region and now control at least 280 square miles of enemy territory along the border.

Ukraine’s president said Thursday that his country’s troops had taken full control of Sudzha, the largest Russian town to fall since the start of the incursion more than a week ago.

Russia is scrambling its forces to defend its own territory, but it’s also ramping up its own operations elsewhere. Military authorities in the eastern Ukrainian town of Pokrovsk on Friday urged civilians to speed up their evacuation because the Russian army is quickly closing in on what has for months been one of Moscow’s key targets.

We learned this week just how important Western-supplied weapons and vehicles have been for Ukraine’s military push into Russia. But could Western pilots take part in the war directly?

Mr. Zelenskyy hopes so. He’s aiming to hire foreign fliers familiar with the F-16 fighter jet to fill the gap until sufficient Ukrainian air force officers are trained. The American-made planes recently arrived in Ukraine, but Kyiv says it doesn’t yet have enough pilots to fly them.

That’s where retired NATO pilots could come in. Sen. Lindsey Graham, the South Carolina Republican who recently returned from his sixth wartime trip to Ukraine alongside Democratic Sen. Richard Blumenthal of Connecticut, said he backs Mr. Zelenskyy’s plan.

“President Zelenskyy told us both that he would be looking to supplement his air force by establishing a program to enlist retired NATO F-16 fighter pilots. We support this effort,” Mr. Graham said. “Ukraine is already fielding units of freedom fighters on the ground, and this volunteer force should be replicated in the air.”

Times Asia Editor Andrew Salmon is tracking a major new initiative coming out of Seoul, where South Korean President Yoon Suk Yeol has pledged to significantly expand the government’s information campaign aimed at North Korean citizens.

The campaign could be a key tool in countering the steady stream of propaganda coming from Pyongyang.

“The freedom we enjoy must be extended to the ‘frozen kingdom’ of the North,” Mr. Yoon told South Koreans, promising to “help awaken the people of North Korea to the value of freedom.”

North Korea, of course, is one of the most closed-off societies on the planet. But the country is set to reopen its borders to limited tourism in December.

• Aug. 21 — AI and the Evolution of Biological National Security Risks, Center for a New American Security

• Aug. 27 — U.S.-Mexico Relations: Addressing Challenges at the Border, Brookings Institution

• Aug. 28 — Weapons in Space: A Book Talk with Dr. Aaron Bateman, Center for Strategic and International Studies

• Sept. 3-6 — Billington CyberSecurity Summit