Stopping jumpers: What to do at the dam bridge?  There were no
reported suicides from the Hoover Dam bypass bridge during the
first year after the span opened. But four suicides this year -
two within the past two weeks - have transportation officials
wondering whether some preventive measures might now be
appropriate.  Certainly no one wants the 900-foot-high
engineering marvel to become a "suicide landmark" on the order
of Niagara Falls, the Empire State Building and the Golden Gate
Bridge.  In its 75 years of existence, 1,558 people have hurled
themselves over the railing of the Golden Gate, the majority
plunging nearly 700 feet to their death.  Nor is it necessarily
true that someone stymied in their original intent of leaping
from one of these landmarks will simply find another way to take
their lives.  It seems counterintuitive, but Richard Seiden, a
behavioral scientist and professor emeritus at Cal-Berkeley,
conducted a study that found of 500 potential jumpers pulled
from the Golden Gate Bridge raili