To help our own team process current events in a supportive space, several of our colleagues have worked to create and facilitate a series of virtual "safe space" meetings.
Here are some of our main considerations in this work:

Be Timely
People are struggling and in pain. We all need space to process difficult events. As a facilitator, it may be helpful to let go of the need to get it perfect. Dialogue needs to happen now. Colleagues are suffering.
Be Explicit
These conversations are centered around racism and the death of black men and women. It is always more comfortable to speak in generic and equivocating terms, but the moment we are in demands dialogue in explicit terms.
Set Ground Rules
Then, stick to them. It is important to step into a conversation with intention. Emotions will arise, and that's okay. Ground rules help the process.
Make it Ongoing
Commit to fostering ongoing opportunities for conversation and learning. Don't make this a one-time conversation to make leadership feel better about "doing something." Systems change takes time.
Do the Work
Lastly, don't expect or ask colleagues of color to teach. It can be damaging, and that is not their job.