Lethal injection gained popularity in the late 20th century as a form of execution intended to supplant other methods, notably electrocution, hanging, firing squad, gas chamber, and beheading, that were considered to be less humane. It is now the most common form of execution in the United States.
Confidence votes 48. Mount Everest is the highest mountain in the world when measured from sea level at 29,029 ft. However Mount Mckinley is taller than Everest when measured from base to summit at 18,400 ft, versus everest's 17,100 ft.
exists and is an alternate of . The highest mountain in the United States is Mt. McKinley at 20,320 ft. Mt. McKinley is located in S. Central Alaska in the Alaska Range. Known locally as Denali [the Great One], Mt. McKinley was first scaled successfully by the American explorer Hudson Stuck in 1913.