Why referendum on guns threatens Switzerland's membership of Schengen

[BECKHAM]

If next month's referendum on gun laws in Switzerland yields a 'no' result, Switzerland could be forced to leave the Schengen Area. Here is why.

for more... (https://www.thelocal.ch/20190415/why-the-swiss-gun-referendum-threatens-alpine-nations-membership-of-schengen-area)