What are the airport security procedures at San Francisco International Airport?

San Francisco International Airport follows the security procedures mandated by the Transportation Security Administration, which ensure the safety of all travelers. Upon arriving at the airport, passengers should be aware of several important guidelines. First, it is necessary to have a valid identification document ready. For domestic flights, a government-issued photo identification, such as a driver's license or passport, is required. For international flights, a passport or relevant travel documents will be essential. Next, passengers must check their bags for prohibited items before entering the security line. Common restricted items include sharp objects, flammable materials, and liquids over three ounces. To facilitate a smooth security screening process, any liquids, gels, or aerosols should be placed in a quart-sized, clear, resealable plastic bag, in accordance with federal regulations. At the security checkpoint, travelers will be required to remove shoes, belts, and jackets, as well as any items from pockets, and place them in bins for screening. Laptops and larger electronic devices must also be taken out of their cases and screened separately. Once through the metal detectors or body scanners, passengers will collect their belongings at the end of the conveyor belt. If any suspicious items or anomalies are detected, security personnel may conduct additional screening, which could include pat-downs or further inspection of carry-on bags. To save time and ensure a stress-free experience, travelers at San Francisco International Airport are advised to arrive at the airport early, typically at least two hours prior to domestic flights and three hours prior to international flights. More detailed and current information regarding airport security procedures can often be found on the official San Francisco International Airport website.