the government. as nbc's richard engel reports, the threat posed by the terror group extends far beyond the middle east. >> reporter: isis militants have land and ambitions and u.s. officials are now worried. several counterterrorism official tell nbc news the threat is, quote, extremely high. they say isis is developing bomb making skills. and cultivating a roster of foreign suicide bombers who could target the u.s. and europe and they are bragging about it. this fighter claiming to be from chile says iraq and syria are just the beginning. >> we shall break the barrier of iraq, jordan, all of the countries left. >> reporter: isis puts out daily propaganda. videos showing its brutal attacks.