us live with that story, from the u.s. mexico border. jennifer? >> john, this is commuting with a capital cbehind me is the boarder crossing this side san diego california, that side, tiawana mexico. every day more than 100,000 people cross the border. and it is this time of night, many are communitying. but there is a twist. >> and before the sun is up, lindon is out the door. like many professionals linda has a substantial commute to and from work. yet it requires more strategy, planning and patience than most. to understand why, i joined linda on her drive. >> good morning, linda. >> hi. >> sometimes if it is a holiday, i can be downtown seth in 40 minutes. to 50 minutes. and the other days it is hours. >> but it isn't so much the normal rush hour traffic that slows her down, every day she drives across this, the world's busiest land border. >> i live in tiajuana, mexico, and i work in san diego. >> and so does mario lopez. and just like linda he lives south of the border, both mario and linda say living in mexico, and working in san diego, is a lifestyle choice. they can cut living expe