Explosions and bang-bang everywhere !?!?

People all over the planet are frightened or

scared to death due to terrorist attacks ,un-

-expected shootings in the streets or natural

disasters which destroy everyone's shelters,ho-

-mes or whole buildings in the cities.

http://www.macmillandictionary.com/dictionary/british/scared

https://euobserver.com/political/132767

Whenever explosions and "bang-bang" happen,out

of the blue,victims and survivors have to face hard

threatening moments in their cities.

The police and authorities react at once ,but the

population often breathes fear in the air because

of the high alert procedures and routines which

have been settled down  in several big cities .

The recent explosion in Brussels came four days

after Belgian police captured Salah Abdeslam,the

main suspect in the Paris attacks in November last

year.

http://time.com/

 http://time.com/4268544/brussels-attacks-presidential-candidates-clinton-trump/?xid=homepage

Reports informed it was a double suicide attack at

Brussels airport and another explosion at a sub-

-way station which have left many people dead and

forced the closure of the city's public transport net -

-work.

Europeans and everybody else are really concern-

-ed and worried about the near future consequen-

-ces of these recent terrorist attacks and disasters.

Are you also worried about these situations ?

What kind of problems may tourists have to face if

they are visiting cities which are being attacked ?