SAN FRANCISCO (CBS SF)– The sight of French fighter jets over the San Francisco Bay had many residents concerned. They took to Twitter, many offering explanations that were mainly guesses, and for the most part, just plain wrong.

It turns out the planes were actually training jets and part of a French Air Force demonstration ‘Patrouille de France’ to commemorate the 100th anniversary of the U.S. entry into World War 1.

According to a news release it “will mobilize more than 70 airmen, pilots, mechanics, support staff, 10 Alphajets, 1 Airbus A400M Atlas and 25 tons of equipment, demonstrating French Air Force reach capabilities.”

The jets paired up with the Blue Angels last week in Florida. Over the month of April, they flew over 9 symbolic monuments to Franco-American unity across the nation, including the Statue of Liberty and the Golden Gate Bridge.