Out of adversity comes _____________. For everyone the answer is different. There are also probably many answers for everyone.
For me, one of the things I've learned over the past five years is the importance of praying for people. When people have prayer requests, I want to--even need to--really, truly take time to lift them before the Father. I pray more for others that I ever did five+ years ago because I understand that people truly need others around them during difficulty to support them in prayer. When you are in the middle of a situation, emotions get tangled up and it's hard to see straight enough to even form a prayer. That's why people outside of the situation praying intently and purposely about a situation is vital.
So yeah. I wish my brother was here and my son was here, but in a sense, every day I'm learning how to benefit from the tragedies I've faced (and do and will face). With God's grace empowering me, I will learn from every situation I face and turn it into overcoming good for the kingdom of God. Period.
(P.S. Those are Brian's daughters in the picture from a few years ago. Love it.)