A solider injured nine days ago in a knife attack on Poland’s border with Belarus has died. Doctors were unable to save his life, the leadership of the Polish armed forces announced on Thursday. According to the army, a migrant attacked and seriously injured a soldier with a knife at the border fence at the beginning of last week. He was initially taken to a local hospital and operated on there but later had to be transferred to a hospital in Warsaw. The incident is making waves in Poland. Prime Minister Donald Tusk announced shortly after the knife attack that Poland would once again set up a…