This guide will let you know how to fix the Recon By Firebug in Call of Duty Modern Warfare 2.
There is a mission called Recon By Fire in the Call of Duty Modern Warfare 2 single-player campaign. It will put you in a Ghillie suit by Captain Price, and you need to shoot enemies using the thermal scope. You will come to a large complex with many guards at one point in a quest. You need to kill them; however, a situation can happen if you kill all the guards, and Prince points his laser pointer at the truck. Then you cannot continue with the quest.
So you need to reload the last checkpoint, but you will lose a little progress. You need to kill some guards again, and then a chat option will pop up. It will show you that you can continue now. You might not kill all the guards if it doesn’t solve your problem. So find them and kill them to continue the quest.