The Transportation Security Administration is reminding general aviation pilots to remain vigilant after the car-bomb incidents in Glasgow and London last week. TSA representatives asked GA pilots to exercise extra vigilance when they go out flying this summer, and report any suspicious activity to local authorities or the toll-free GA hotline, 800-GA-SECURE. AOPA offers information and resources to help pilots enhance security at their airports. Secure your aircraft and follow airport security requirements, AOPA says, and most important, be sure and watch for and report unusual or suspicious behavior. For more info about GA security, visit AOPA's Airport Watch Web site.