The new MW3 Season 4 just started and along with a whole bunch of new content a new powerful killstreak was introduced. It is called the received the DNA Bomb Killstreak.
MW3 DNA Bomb Killstreak explained
Modern Warfare 3‘s DNA Bomb will allow you to eliminate all players on the opposing team at once. Once you get the DNA Bomb Killstreak, you need to activate it and the entire enemy team will be wiped out. The DNA Bomb Killstreak has replaced the MGB Nuke Killstreak in Season 4. This means you can no longer rack up 30 kills without dying and call in a Nuke to end the match in MW3.
How to get DNA Bomb Killstreak in MW3 Season 5
MW3 players must get 25 kills in a row without dying to secure the DNA Bomb Killstreak.