The now-deleted image of commander Cameron Yaste firing a rifle with a back-to-front scope and the lens cap still attached.US Navy/Web ArchiveThe US Navy has been criticized for posting a picture of a sailor firing a rifle with a rifle scope on backwards.The sailor, commander Cameron Yaste, had been firing at a naval target balloon.The Navy acknowledged the error and removed the picture.The US Navy has been slammed on social media for posting a photo online of a sailor holding an assault weapon with its scope on backwards.In an image posted to Instagram, which has since been deleted, commander Cameron Yaste, the captain of the USS John S McCain, could be seen holding the gun, which also had its scope's lens cap still attached.The caption accompanying the photo read: "From engaging in practice gun shoots, conducting maintenance, testing fuel purity and participating in sea and anchor details, the #USNavy is always ready to serve and protect."According to a press release from the Defense Visual Information Distribution Service, the captain had been firing at a "killer tomato," a Navy term for a target balloon.Viewers were quick to point out his mistake.One X user wrote: "US Navy just killing it on Instagram" alongside laughing and crying emojis.Another said: "U.S.