the bravest among us signing up to fight alongside ukrainians against violent russian forces. emily aikeda tells us why these americans decided to join the fight. >> reporter: as war torn ukraine is shelled and bombed, the country's desperate call for volunteer fighters grows louder. among those willing to march in, americans, like new jersey carpenter andrew bennet. >> was there a moment you decided you're going to go and try to fight in ukraine, help ukraine? >> yeah, the moment i found out. >> have you thought about what would happen if you get injured? >> i guess i'll figure out when i get there. >> the risks are enormous. nevertheless he's ready and willing to be part of the bravest armed forces and join the international legion of territorial defense, which has ballooned to 16,000 volunteers