Here is a beautiful dua for peace and security in the countries we live in. 

اَللّٰهُمَ اٰمِنَّا فِي أَوْطَانِنَا، وَأَدِمْ نِعْمَةَ الأَمْنِ وَالاسْتِقْرِارِ فِي بِلادِنَا بِرَحْمَتِكَ يَا أرْحَمَ الرَّاحِمِينَ

O ALLAH! Grant us security in our lands Country, and continue to bless us with peace and settlement there. With Your Mercy, O Most Merciful!

Allahumma aminna fi awtanina, wa adim ni’matal-amni wal-istiqrari fi biladina bi rahmatika ya arhamar-rahimeen.