There was an odd sound as Kit Crosby watched her father's plane
disappear below the line of trees. It was a sight she and her
mother had become used to; after semi-retiring from a career in
the financial industry, J. Player Crosby volunteered his amateur
flying skills around the world, doing everything from ferrying
Native American athletes to ultra marathons in the west to
tracking elephants in Africa.  Itsing Batsholelwang, left, and
his twin brother Tirafalo warm up in Manhattan before a training
run for Sunday's New York City Marathon. Philip Montgomery for
The Wall Street Journal  After every trip he would land softly
in the field behind their Massachusetts home, mischievously
buzzing the cows that grazed nearby. This time was no different,
her mother assured her.  Then they saw the smoke rising from
above the trees. The two women hurried into their car and drove
down to the field just in time to watch the plane explode.  Mr.
Crosby had suffered a massive heart attack during the landing,
just a month bef