CrossFit Quantico coaches Elizabeth Green and Capt. Adam Tabalno demonstrate proper push press technique for Rebekah Alemagno during the Jan. 8, 2014, workout. The two volunteer coaches offer the exercise program daily, for free, with no operating budget. - CrossFit Quantico coaches Elizabeth Green and Capt. Adam Tabalno demonstrate proper push press technique for Rebekah Alemagno during the Jan. 8, 2014, workout. The two volunteer coaches offer the exercise program daily, for free, with no operating budget.