Charles Rex Arbogast / AP
An unidentified girl looks skyward as she joins others around the gravesite of Hadiya Pendleton.
Nam Y. Huh / AP
Danyia Bell, 16, left, and Artureana Terrell , 16, read a program for the funeral of Hadiya Pendleton.
"Her smile lit up a room," she said. "The last thing I saw before they put her in that ambulance was her smile and I know she's smiling down on us now."
-- Reported by Alexandria Fisher, NBCChicago.com
The first lady joined hundreds of mourners on Saturday at the funeral of Hadiya Pendleton, 15, who was killed at a park near her Chicago high school. NBC's Kristen Welker reports.