ms. anders. >> mr. chief justice, and may it please the court. in order to avoid the arbitrary results that the bright line rule would impose on traffic stops, a dog sniff conducted during a traffic stop should be subject to a reasonableness analysis. >> how long is reasonable? you keep saying in your papers you have to look at the totality of the circumstances. but i don't know what that means. i think that keeping me most of the time and chief, i have been stopped, keeping me past -- >> so have i -- >> keeping me past giving me the ticket is annoying as heck whether it's five minutes, ten minutes, 45. but how do you define that? what are the circumstances that would make any difference in holding somebody five minutes or 45? it all has to do with your needs, not the passengers' needs. >> well, if i could explain what the reasonableness approach is. first of all it's not a approach that focus on the amount of isolation. it's a question about the objective reasonableness of the stop. >> to accomplish what. >> to go into their home and search thei