Open Borders Equal Liberty?

Stockholm, Sweden: 63-year-old Daniel Cuevas Zuniga was peddling home after his night shift.  He stopped to pick up an object that he thought was a toy:

It was an M-75 hand grenade. Manufactured in great numbers for the Yugoslav national army, and then seized by paramilitaries during the civil war in the 1990s, the grenades are packed with plastic explosives and 3,000 steel balls, well suited for attacks on enemy trenches and bunkers.

So reports the New York Times.  Zuniga died; his wife, W...