The Honduras deal, which calls for national unity government and agreement on Nov. 29 elections, pushes back against the dominant narrative of waning US clout in region.
Some say President Manuel Zelaya's surprise return increases the prospects for violence. The interim government has imposed a 15-hour curfew.
Amnesty International says Honduran interim authorities conducted mass arrests and beatings of those who support ousted President Manuel Zelaya.
Chief mediator Oscar Arias asked for a 72-hour extension and warned of civil war after talks broke down Sunday.
Ousted President Manuel Zelaya flew over Honduras international airport Sunday, but military vehicles blocked a landing. What's next?