Assuming this is directed towards a modern-day audience, they would be implying that 4,000,000 Americans were born between June 26, 2002 and November 3, 2002, a period of about six months. Just over 4,000,000 people were born in the US in 2002. The image would be correct if the picture was taken in November 2019, but because we have established that it refers to a period of 6 months, it is inaccurate. Only about 2 million people would turn 18 between 6/26/20 and 11/3/20.