What is the difference between Global Entry and SENTRI programs for expedited entry into the United States?

Global Entry and SENTRI are both programs that allow for expedited entry into the United States, but they have some key differences. Global Entry is primarily for international travelers, offering expedited processing at customs and Immigration checkpoints at airports. SENTRI, on the other hand, is designed for travelers crossing the U.S.-Mexico border by land, providing expedited processing at designated lanes. Both programs require pre-approval and background checks, but they cater to different types of travelers and entry points into the country.