Wisconsin National Guard Soldiers and Airmen joined forces for a two-day Chemical, Biological, Radiological, Nuclear and Explosives Enhanced Response Force Package (CERFP) exercise at Volk Field Air National Guard Base, May 1-2.The exercise allowed service members to prepare for the first-ever CERFP one-day inspection, scheduled to be held next month."This is going to be the first team to be evaluated using a one-day evaluation process, so they are kind of in the spotlight," said Travis Dauer, National Guard Bureau Joint Collective Training Branch weapons of mass destruction-chemical, biological, radiological, nuclear analyst.