evidence: 3. Pfizer's Rocky Mount, N.C.-based 1.4 million-square-foot manufacturing plant has resumed production after it was damaged by a tornado in July. [...] 2. A tornado ripped through a Pfizer plant in Rocky Mount, N.C., damaging its warehouse. The facility makes about 25 percent of the company's injectable medications used by hospitals. As many as 500,000 pallets of medicine were destroyed in the disaster.