to complete an active airyj obligation of a definite term.| * * *IMPOSING FIGUREi WASHINGTON un — Justice • Department files on the Co i ' Nostra crime syndicate no ■r contains names of “a couple d of hundred thousand” persons n and businesses.That round but imposing c figure was provided Tue-da 5lt; by Henry Peterson, head o' the department’s organize; n crime and racketeering sectio:., in an interview.n Although these individua and businesses are thought o ie have ties with the Cosa No-1- tra, the department has under e close observation the activities a* of several hundred at mlt; Peterson said.