The basic answer is nuclear weapon,it was said that the americans and the Russians have in ther arsenals,the nuclear weapon that can destroy the world in 24hrs.this work by producing large fire nuclear balls.The bible said the earth will be wiped out by fire,thinking the fire will be from the nuclear weapons.
When 1g of uraniun is processed it generates an energy of about 300000KJ,which can boil 10000 litres of water in one over one million secs.
The first atomic bomb was developed in us by a group of scientist and was first tested on july 6 in the alamorgodo desert in the new mexico in the year 1945.
Was used in Nagasaki and Hiroshima on August 6 and 9 respectively,the fire ball generated then dried up trees 10km away instantly.
A 2yr old boy that survived the explosion then cant stop playing with sand and thinking like a 2 yr old after 45 yrs,the brain stopped growing.
If you have a single nuclear weapon you are consider a super nation and that is one of the reason north korea will not cancel there nuclear weapon program for a trillion dollars.
LIst of countries with nuclear weapons
1.RUSSIA
2.U.S.A
3.CHINA
4.INDIA
5.U.K
6.PAKISTAN
7.GERMANY
8.ISREAL
9.FRANCE
10.?IRAN
11.NORTH KOREA