My thoughts are with their loved ones.

Unfortunately this needs to be pointed out in order to prevent future fatalities.  There are some days you don't go into the back country.  The avalanche forecast for Wednesday was triple-high, meaning it was a 4/5 below, at, and above treeline.  These are days you find something else to do.

These two, being from Boston, maybe didn't realize how dangerous it was.  Maybe they felt comfortable because they had transceivers or maybe because they were on vacation they felt they didn't want to miss out on their limited time in Banff.  What no one ever tells these folks is that transceivers are corpse finders.  I can't think of a more horrible way to go than being encased in concrete and slowly suffocating.  Hopefully they were knocked out by trauma and just never woke up.  Poor souls.