GREAT FALLS - Some Great Falls residents aren't welcoming the Montana Air National Guard's transition from F-16 to F-15 fighter jets, saying the noise from the new aircraft is bothersome.

Maj. Rick Anderson said the Guard has received complaints in recent months, but the noise generated from both jets is very similar. He said he thinks people are just readjusting to having military aircraft overhead.

Montana pilots switched to the F-15s in August 2008 after flying F-16s for more than two decades. The Guard has received all 18 of its F-15 jets, and Anderson said more sorties are being generated on a daily basis.