A really bad day for aviators..
 

Bryan Jensen, pilot of "THE BEAST" airshow biplane crashed today in Kansas
Iowa Pilot Killed - WHO

and on the other side of the pond one of the Red Arrow pilots crashed.
Red Arrows pilot killed in crash - Telegraph

My thoughts go out to the families of these men, they died doing what they loved.

Sad to hear.

RIP.

A commercial jet went down in Canada as well...
Plane crash kills 12 in Canada's Arctic - CNN.com

I hate to see fellow pilots go down (or anybody else for that matter) but bad things always come in three's.:(

Terrible to hear. The red arrow pilot crashed on approach AFTER the aerial display. Real bummer all around. :(

Just heard something about another crash but couldn't get details. So much for my "comes in 3's" theory.

hate it...I have a real respect for pilots

Wing-walker fell in Detroit whilst trying to transition from plane to helicopter...

Wingwalker dies after fall at Michigan air show - South Florida Sun-Sentinel.com

More...

A airshow wingwalker, transferred from a Stearman to a helicopter in the air. Hanging on the skid and lost his grip.

Mort.

Can't find the link at the moment.

I very nearly took my family to the KC airshow. That would have been pleasant to explain to my 4 and 7 year old. RIP to all lost, a good buddy of mine is our company airshow pilot so these always hit a little close to home.

i was about 8 or 9 at an air show here in Fresno in the 70's, when a biplane did an inverted flat spin straight into the runway and explode into a fireball about 300 yards in front of the crowd.
I still have that image in my head to this day

Sad for the family of the pilot, and air show viewers