Adm. Brad Cooper told senators that Tehran has 10 percent drone and missile capacity, disputing other assessments.
A group of U.S. officials led by CIA Director John Ratcliffe were in Cuba on Thursday.
Artificial intelligence and trade relations are also on the agenda between Trump and Xi.
Scientists funded by the government carried out the work.

The Pennsylvania Democrat criticized a Sanders-Ocasio-Cortez bill that would pause AI data center construction until federal safeguards are in place.
Customs and Border Protection Commissioner Rodney Scott confirmed the chief’s exit on May 14.
The proposed budget would cut $1.8 billion in spending and deposit $9.7 billion in reserves.
A planned joint venture will use satellite-based technologies to fill in wireless coverage gaps, especially in rural areas.

Higher energy costs are pushing some travelers to take fewer trips, stay closer to home, or cut spending on accommodations.
Members of Congress continue to receive salaries during shutdowns because the Constitution guarantees lawmakers’ compensation.
The narcotics were being shipped via sea, where 80 percent of interdictions of U.S- bound drugs typically occur.
Under the measure, the Clean Air Act would be amended to extend to E15 the same RVP waiver currently granted to standard E10 gasoline.
The recovery ends the search for two soldiers lost during an annual training in Africa.
Passengers are being encouraged to remain in quarantine.
The president also posted on Truth Social a map of Venezuela with the stars and stripes on it, under the words ‘51st state.’
Dr. Stephen Kornfeld, an oncologist, says he is the American who tested positive for hantavirus.
Experts disagree on how much the Callais ruling will help the GOP in the approaching midterm elections.
As he departed Washington, the president reiterated that he believes Cuba is a ‘failed nation.’
More than 10,000 foreign students ‘claim to be working for highly suspect employees,’ according to Acting ICE Director Todd Lyons.
The person is in quarantine in Atlanta.