Aftershocks rattle Italy

The toppled cross of a church lies amid debris in Crevalcore, northern Italy, Sunday, May 20. 2012. A magnitude-6 earthquake shook northern Italy early Sunday at 4:04 a.m. between Modena and Mantova, about 35 kilometers (22 miles) north of Bologna at a relatively shallow depth of 10 kilometers (6 miles). (AP Photo/Marco Vasini)
The toppled cross of a church lies amid debris in Crevalcore, northern Italy, Sunday, May 20. 2012. A magnitude-6 earthquake shook northern Italy early Sunday at 4:04 a.m. between Modena and Mantova, about 35 kilometers (22 miles) north of Bologna at a relatively shallow depth of 10 kilometers (6 miles). (AP Photo/Marco Vasini) (AP)

Thousands of people in northern Italy slept in tents and cars overnight as more than 100 aftershocks rocked the area hit by a magnitude 6.0 earthquake that killed seven people and inflicted heavy damage to centuries-old cultural sites, May 21.