Can Ukraine's Use of Long-Range Weapons Trigger WW-III?

Ukraine has been seeking permission to use long-range weapons against Russia for a long time. And now it seems that may be paying off. Western allies are now considering shifting their stand and allowing Ukraine to target spots deep inside Russian territory. So, can Ukraine’s use of long-range weapons trigger World War 3? How will these long-range weapons help Ukraine? Why does Ukraine want to use these weapons now? News9 Plus decodes it for you.