abc's chuck roberts explains. >> reporter: tattoos can be a work of of art, form of of expression or by-product of young rebellion. jenna had four before she was 20. at 30 she wants to get rid of most of them. >> it was nice when i was younger. i try to be more professional now. >> reporter: with lasers doctors can eliminate some evidence. years ago the only options were to cut out or sand off the tattoo leaving permanent scars. now plastic surgeons erase them with intense beams of light. >> it provides a certain amount of heat which breaks up the tattoo pigments. >> reporter: single-color black or blue tattoos are the ease yeflt to take off. >> the lasers have an easier time picking up those darker colors than the lighter ones. >> reporter: they don't magically disappear. sometimes it takes months, even years for a tattoo to fade away. the procedure is painful, so jenna says think before you use your body as a canvas. >> you should put a picture by your bed of the tattoo you want, wake up every morning, look at it for two to three weeks, if you're not sick of it by then it's probabl

i'm chuck roberts. in for richelle carey today.b suspect. faisal shahzad boarded a plane even though he had been added to the no-fly list that afternoon. from now on, airlines will have to check the no-fly list within two hours after being informed they've been updated. previously, they had to update every 24 hours. >> the suspect's name was entered a little after noon, i believe, on monday. therefore, on the no-fly list the airline didn't have to check necessarily at that point. the new rules require that that happen at a two-hour interval. if airlines are notified that somebody has been added as a risk to the no-fly list. >> a law enforcement source with knowledge of this sdregs into the failed times square bombing tells our sister network found an interesting train event receipt. it shows faisal shahzad got on a train for new york bound for connecticut 30 minutes after allegedly parking that car bomb. the source says investigators believe he ran to catch the train, which pulled out around 7:00 or 7:15 local time saturday. we als