Elizabeth Warren knew her fellow passengers were going to look at her funny. She also knew that flying around the country with a bulky photocopier strapped into the seat next to her would cost a fortune in extra airfare. But this was 1981. Photocopying was still a relatively new and expensive technology. Considering the huge number of court documents Warren and her colleagues were going to be printing out, paying to use the courthouse copy machines was simply out of the question. The only cost-effective workaround was to buy one of their own — they nicknamed it R2D2 — and lug it around as they traveled from city to city collecting data.