A violent storm system that spawned at least two tornadoes killed two people and left a trail of damage on April 9 as it swept across a 50-mile swath of north central Illinois.
The day after, Chicago Tribune photographer Armando L. Sanchez went up in a helicopter to capture photos of the destruction.
Aerial photos: http://trib.in/1Fuaui6
Other photos: http://trib.in/1acVtmz
