Merry...My assumption was that it is all halaal until I saw some red flags. The link Talig sent merely says that if the meat has a Halal stamp on it then it should be truly Halal and certified by a Islamic body in the US. Great!

Sorry to paste big chunks of it here but perhaps it may help:

# Ritual Slaughter - Islamic Slaughter Certification. A certificate of Islamic (Halal) Slaughter is required. Exporters may obtain a Certificate of Islamic Slaughter from a member of an Islamic Center or Islamic organization. A certificate of Islamic Slaughter is a certificate issued by a member of a Moslem organization recognized by the importing country to provide this service; the certificate states that animals were slaughtered according to Moslem religious requirements. This certificate must accompany products labeled "Halal" . The certificate must be endorsed by the Arabian-American Chamber of Commerce and by the Qatar Consul and must accompany all shipments. The telephone numbers of the Arabian-American Chambers of Commerce are listed below.

It does not say all the meat and products entering the country are Halaal stamped and certified. Just like many in the forum have already pointed out, we have many products that are straight up from US supermarkets, e.g. Sara Lee meat, several meat spaghetti sauces which many Muslims in the US will not buy. Now just cause that same spaghetti sauce is here in Qatar does not make it Halal.

Your point about the Brazil Halal meat industry is the same as Australian Halal meat. The source is not the issue but the process followed to slaughter etc. is.
The US does not have a Halal meat industry (to my knowledge) else Muslims living there would be using it which they are not.