For every high-flying or brightly colored crime-fighter that the Marvel Universe has to offer, there is at least one tragic or harrowing event that has haunted them throughout the better part of their career. Unfortunately, those kinds of heartbreaking circumstances are rarely relegated to being a once in a lifetime occurrence, especially for the most capable heroes.
Source:https://www.cbr.com/sentry-alan-moore-mirecleman-remix-marvel/