Two people were killed when the bomb went off but the effect of that is still with us - the recent past is connected to the present, so I choose to use the present perfect passive tense.

you will need to use a past tense. In German, you can use the perfect tense. This also exists in English to show that you have done something: The perfect tense: How to talk about the past in ...

One way to weather market volatility is to focus on quality dividend stocks, and this is the perfect time to consider ... which contributed to sales declines the past few years, while competitors ...