Arsenal are on their way to the United States for their pre-season tour. The Gunners are scheduled to play three games on the other side of the pond. They kick off their tour against Andoni Iraola’s Bournemouth. Then, Arsenal take on Manchester United and Liverpool in the space of a week before heading back to North London to prepare for the Emirates Cup. Mikel Arteta has named a 26-man Arsenal squad for the USA tour, and a few hugely talented young players have been called up. Here are five of them you should keep an eye on. Five Arsenal gems who could shine during the USA tourTommy SetfordTo…