Very sad. Something similar to this happened in Spain about a year ago - a lake cruise with a group of elderly people that capsized, killing about 15 of them. I think it was later found that poor maintenance and overcrowding were at fault.
B) they're still investigating the report of a "large speed boat" crossing too close and upsetting the tour boat by wake.
C) it now appears the folks were all from MICHIGAN - but the tour was booked though a Canadian tour group.