In 2013, Amazon Founder and now Executive Chairman Jeff Bezos raised eyebrows and a bit of doubt when he said the retail giant would be operating drones. Three years later, Bezos tweeted “First-ever #AmazonPrimeAir customer delivery is in the books. 13 min—click to delivery.”

Amazon Prime Air, the company’s drone service, said in July that it would begin operating in Lockeford, Calif., 40 miles southeast of Sacramento, and College Station, Texas, two hours northeast of Austin.

And on Dec. 22 the drones took off.

“First deliveries from our new sites in Texas and California,” David Carbon, vice president of Prime Air at Amazon, said on LinkedIn.. “These are careful first steps that we will turn into giant leaps for our customers over the next number of years.”

An Amazon spokesperson said the company was starting in these two locations and will gradually expand deliveries to more customers.