The Fort Worth Zoo in Texas has welcomed pair of critically endangered Sumatran tiger cubs — the first in the zoo's history. David Muir shares the milestones they've already reached.
WATCH: David Muir shares milestones of Fort Worth Zoo's Sumatran tiger cubs
Oct 3 -
The Fort Worth Zoo in Texas has welcomed pair of critically endangered Sumatran tiger cubs — the first in the zoo's history. David Muir shares the milestones they've already reached.
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