Tim Cook says Apple's manufacturing expansion across the U.S. will create a 'domino effect'
1. Apple commits $600 billion to U.S. manufacturing over four years. 2. 79 factories in the U.S. will benefit from Apple's investments. 3. Apple's investment may inspire other companies to build factories. 4. Recent $2.5 billion investment in Corning's Kentucky factory emphasized. 5. Cook believes shareholders support Apple's domestic manufacturing commitments.