KPCC's Frank Stoltze rides the Metrolink 111 as commuters nervously ventured back onto trains after the Chatsworth crash.

Just one sign -- found in downtown Los Angeles -- of the tragedy that touched so many Southern Californians.
(
John Rabe
)
KPCC's Frank Stoltze rides the Metrolink 111 as commuters nervously ventured back onto trains after the Chatsworth crash.