History of Bombs? What Bombs?

Bombs? What Bombs? is a Countdown triumph: defuse multiple charges in a single match. Progress counts "Medals earned".

How to complete

1. Queue Countdown in the Crucible and play as the defending team when your side's rounds come up. Teams alternate attacking and defending, so you need several defending rounds.
2. When an attacker arms a charge (about 3 seconds to plant at one of two sites), go straight to it. Defusing takes a little over 5 seconds, and once armed the charge explodes after a timer (about 40 seconds in the wiki, a 60-second timer in the older Shacknews guide; the number may have changed over time).
3. Prioritise the defuse over killing attackers: a detonating bomb loses the round even if attackers are wiped. Use your teammates' Revive Tokens and cover to make the defuse.
4. Repeat for more than one defuse in the same match. The exact number needed was not stated in the sources.

Notes

The seal/category and reward were not confirmed.