ethan harris joining us as guest house.d the collapse we have seen since september. >> sony to the right thing by pulling "the interview" out of movie theaters. ♪ >> this is bloomberg "surveillance." time for the must-read. i have a must listen from the president. president obama spoke with abc news about the historic decision to restore diplomatic ties with cuba but he also weighed in on the sony hacking scandal. >> the cyber attack is very serious -- we are investigating and taking it seriously. we will be vigilant and if we see something that we think is serious and credible we will alert the public but for now my recommendation is people go to the movies. >> he recommends people go to the movies but sony decided to pull it regardless because the theater operators are fairly cautious. sony has changed its tune so many times -- they had what they initially described as a piracy problem when it was a hacking problem -- then a pr problem and now they are treating it like a business problem like they can pull the movie and t