WASHINGTON (AP) -- Americans paying $3 per gallon at the pump have it relatively cheap when compared with prices globally, say oil and gas company executives who defend their record profits as essential to maintaining supplies. ADVERTISEMENT click here In parts of Europe and elsewhere in the West, gasoline prices are more like $5 per gallon to $7 per gallon, said the chairman of ConocoPhillips Co., James J. Mulva. "This is a global business, and it's not only that we need to add to supply, but we need to reduce demand," Mulva said. "In the United States alone, we have...