►According to federal investigators, traces of ricin were found on a discarded dust mask used by J. Everett Dutschke, who has been arrested as the alleged sender of letters containing the deadly substance to President Obama and others. An affidavit, just released, says that Dutschke "was under FBI surveillance on April 22 when he returned to the taekwondo studio he once ran and removed several items, placed them in his van, and then discarded them in a public garbage receptacle about 100 yards away." The items included a coffee grinder, a box of latex gloves and a dust mask. "The mask later tested positive for ricin," reports the Washington Post. Records obtained by the investigators showed that Dutschke twice ordered castor bean seeds on eBay. The affidavit can be read online at CNN.
►The Los Angeles Times reports that "the CIA, Justice Department and Homeland Security Department have launched a high level internal review of whether intelligence was mishandled prior to bombings of the Boston Marathon, officials said. President Obama told a White House news conference that the review would seek to answer whether 'additional things… could have been done' and that 'might have prevented' the two bombings that killed three people and injured more than 260 on April 15." Congressional committees will be looking into the issue as well.
►Credentialed workers at Dallas-Fort Worth International Airport have been caught misusing their security badges. Those discovered have not been merely airline workers, but also pilots, U.S. Transportation Safety Administration supervisors, and airline executives. For example, an American Eagle high-level executive had his badge taken after using it to allow his wife entrance to a restricted area. NBC News reports that "Out of more than 140 confirmed security violations in two years--at least 106 were linked to badge holding employees and vendors."
►Security is being ramped up for this year's Preakness in the wake of the Boston Marathon bombings. The horse race is held at Pimlico Race Course in Baltimore. Maryland. ABC News reports that "backpacks and duffel bags will be prohibited at the Preakness this year...[and] for the first time, only clear coolers will be allowed in the building and the infield at the middle jewel of racing's Triple Crown. The new policy also forbids laser lights and pointers, along with cameras with lenses more than 6 inches in length."