Zoo patrons look through a window at an African lion in a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco,...
Zoo patrons look through a newly installed barrier in an enclosure where a Siberian tiger escaped in December 2007 at the San Francisco Zoo February...
Tony, a Siberian Tiger, sits in a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco, California. The San Francisco...
Zoo patrons look through a newly installed barrier in an enclosure where a Siberian tiger escaped in December 2007 at the San Francisco Zoo February...
Tony, a Siberian Tiger, walks by new fencing in its renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco, California....
Tony, a Siberian Tiger, yawns as he walks through his renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco,...
Fencing and an electric hot wire fence are seen in a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco,...
Tony, a Siberian Tiger, sits in a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco, California. The San Francisco...
Zoo patrons look through a window at a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco, California. The San...
Zoo patrons look through a window at an African lion in a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco,...
Zoo patrons look through a window at a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco, California. The San...
Tony, a Siberian Tiger, is seen through a glass barrier as he sits in a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San...
Tony, a Siberian Tiger, sits behind new fencing in its renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco,...
African lion paw prints are visible on a window in a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco,...
Zoo patrons look through a window at an African lion in a renovated big cat grotto at the San Francisco Zoo February 21, 2008 in San Francisco,...
Young zoo patron peeks around a corner to look through a window at an African lion in a renovated big cat grotto at the San Francisco Zoo February...