UPDATE. The initial version of the CBS interview quoted Zelenskyy as saying that NASAMS are already in Ukraine. Afterward, CBS issued a correction, saying they got the translation wrong, and that NASAMS will reach Ukraine in only two months. This news post has been updated to reflect the change. 
"Third, and very important. It's air defense. For this, we also need that the US showed its leadership character and gave Ukraine an opportunity for air defense. A positive decision has already been made. I thank the president and Congress, and both parties that the decision has been made to give Ukraine NASAMs. It's air defense but it won't be nearly enough in order to protect schools, universities, education infrastructure, hospitals and medical infrastructure and to protect homes of Ukrainians," Zelenskyy said.NASAMS is a Norwegian anti-aircraft missile system with an American radar that shoots down planes, helicopters, and cruise missiles.