Framework

i

1937 dust storm.

i

About 500 people prospect for gold in San Gabriel Canyon.

i

Smog clouds the view on Broadway, looking south from 1st Street.

i

Lightning over city skyline looking south from Elysian Park.

i

After a 1917 U.S. Supreme Court decision, the Los Angeles Times campaigns against billboards in...

i

Jay Maushardt, 6, of Sherman Oaks, wears a gas mask and plays with his toys during Echo-Action...

i

Southern Pacific freight train passes P.J.'s on Santa Monica Blvd. in West Hollywood on old...

i

Chemical engineer Edward Liston, right, of Stanford Research Institute (SRI) checks on five...

i

UCLA researchers Richard D. Hopa, left, and Hiroshi Kimura, demonstrate new anti-smog device...

i

The current construction, and this weekend's "Carmageddon." along the San Diego Freeway through...

i

Six graders march during original Earth Day in 1970.

i

For some 40 days and 40 nights, no winter rains in LA.