0 over a span of 19 days. they stole strak data from the cards. target now issuing this letter to customers apologizing saying they are working with a forensics firm to find the culpri culprits. used a different card that you used at target during that period. that s probably the safest thing to do. anyone who has a credit history wants to continually check. it it shouldn t be exposure specific. reporter: the track data is very valuable on the black market and can be used to make purchases online or entirely fake cards in a a process called cloning. the more proactive you become and try to protect yourself, it doesn t seem to matter. reporter: the hardest part many of the largest rings are overseas. as you might imagine, those overseas rings make it very tough r the u.s. to prosecute. six rows. sections of the balcony also fell with the ceiling pinning down a number of people. for now they are ruling out foul play. the senate barrels into its last day in session with tw