Mexican Military Crosses Border

I guess we're supposed to be grateful, but do we really need foreign troops on US soil?

I'd like to see some questions answered:

• Are they armed?
• Do they have authority over Americans who don't want their help?
• Why have we placed ourselves in a position where we need their manpower?
• Why is it that an American citizen trying to bring a truck of relief supplies in will reportedly get turned away at gunpoint, but a Mexican soldier doing the same is hailed as a liberator?

Maybe they can help with the forced evacuations and weapons confiscations.

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UPDATE: Looks like they're unarmed. Link courtesy of Texican Tattler.

UPDATE UPDATE: Gunner links to an account that says they are armed.