LOCATION@1 Immigration and ORGANIZATION@1 -LRB- ICE -RRB- is a federal law enforcement agency under the ORGANIZATION@2 -LRB- DHS -RRB- , responsible for identifying , investigating , and dismantling vulnerabilities regarding the nation 's border , economic , transportation , and infrastructure security .

LOCATION@1 Immigration and ORGANIZATION@1 -LRB- ICE -RRB- is the largest and primary law enforcement agency of the ORGANIZATION@2 -LRB- DHS -RRB- .
