Provide the highlights for the following article:\n    (CNN) -- The chief operating officer of the National Children's Museum was arrested Tuesday and is charged with distributing child pornography over the Internet, authorities said. NAME_1 is accused of sending images depicting child pornography to people he believed to be a 12-year-old girl and her 33-year-old mother, according to a statement issued by U.S. Attorney NAME_2 of the Southern District of New York. In reality he was communicating with an undercover detective for the New York Police Department. Some of the pornographic images were sent from NAME_3's computer at the museum, according to an affidavit filed in support of the charges by a special agent who investigates child pornography and child exploitation for U.S. Immigrations and Customs Enforcement. The Washington museum posted a message on its Web site saying officials there are \"horrified\" by news of NAME_3's arrest. They reported that he has been suspended from his post, effective immediately, and is barred from the property. NAME_3, 49, was arrested at his home in Falls Church, Virginia, by federal agents, according to the prosecutors' statement. Authorities allege he engaged in several instant messaging \"chats\" and e-mail communications with the undercover detective, posing as the woman and her daughter, from August  to September. He is charged with five counts of distributing child pornography in interstate commerce. If convicted on each count, he would face a sentence of up to 140 years in prison -- up to 20 years for the first count and up to 40 years for each additional count, prosecutors said. NAME_3 allegedly initiated contact with the undercover detective, posing as the mother, in an America On Line chat room called \"Cuties.\" The chat room attracts people who \"are known to trade in pornographic images, including child pornography,\" according to an affidavit filed in the case by a special agent who investigates child pornography and child exploitation for U.S. Immigration and Customs Enforcement. \"On five separate occasions in August 2007, NAME_3 sent several images of child pornography over the Internet to the mother and the daughter, including images depicting sexual acts between minors and adults and images depicting known victims of child exploitation,\" prosecutors said. In his communications with the supposed daughter, NAME_3 pretended to be a 15-year-old boy, authorities said. In August 2007, he sent her two images featuring child pornography, according t