Passenger activity was up 1.3 percent at Des Moines International Airport in January compared with the same month a year ago, officials announced late last week. A total of 171,829 passengers came through the airport, up from 169,700 in January 2013. An Airport Authority Board member told the Business Record that the airport was pleased with the number given how many flights were canceled in January due to weather. Cargo activity at the airport was down 6.3 percent for the month.