Fully vaccinated Americans will likely be required to receive a booster shot as soon as this fall to help guard against the raging Delta variant, which is threatening to undo many of the gains the nation has made against COVID-19. FDA officials are hoping another shot will do the trick.

The Delta variant, which now accounts for 20% of the new cases in the U.S., and other new mutant strains of the virus are forcing health officials to play things by ear:."It would be nice if it’ll turn out that it’ll be a year before anyone might need a booster, but we still don’t know,” Dr. Peter Marks of the FDA explained. “It could be more, it could be a little less but ... this is just something we’re gonna have to figure out as we go.”

WILL YOU NEED A COVID BOOSTER SHOT TO STOP VARIANTS?

Two Iranian state-controlled media websites were shut down Tuesday, apparently the result of U.S. sanctions, as the Islamic state accuses America of working with Israel and Saudi Arabia "to block pro-resistance media outlets exposing the crimes of U.S. allies in the region."

Press TV and Al-Alam's websites displayed a single page with a statement that it "has been seized by the United States Government" and making references to US sanctions laws. Domains tied to Iran-backed groups in Iraq and to Hezbollah, the Lebanese military-political faction, were also frozen with the Justice Department message displayed, although the U.S. government has yet to confirm or deny any involvement.

FIND OUT IF AND WHY THE US IS BLOCKING IRANIAN MEDIA SITES

This may sound like the plot for a low-budget movie on the SyFy Network (and it probably is), but NASA has sent baby squids to the International Space Station for medical research. What could possibly go wrong?

As part of its study into how spaceflight affects the immune system. NASA partnered with SpaceX to send the inch-long cephalopods to the ISS earlier this month. Scientists are examining their immune systems, which are similar to humans. "If humans want to spend time on the Moon or Mars, we have to solve health problems to get them there safely,” said one researcher -- moments before being devoured by a giant space squid

SEE HOW ANIMALS PLAY A MAJOR ROLES IN SPACE TRAVEL

We told you about NASA sending squids to the ISS, but they aren't the only animal astronauts. What was the first species to reach outer space?

Tuesday's answer: Jack Daniel's Distillery in Lynchburg, Tennessee is the top-selling whisky in the world, producing about 13 million cases annually.

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