Experts say the North's fast pace in testing activity shows its dual goal of advancing its weaponry and applying pressure on Washington over a deepening freeze in nuclear negotiations.
The at-home tests are expected to be delivered by USPS later this month. The White House said the site is in "beta testing" and will be launched formally Wednesday.
Worries about waning immunity and talk of COVID booster shots has some Americans checking their antibody levels to see if they're protected. But scientists warn blood tests don't tell the full story.
It looks like the Georgia Milestones test might not be tied to grade promotion this year after all. So far, students in third, fifth and eighth grades...
