The families of 43 missing Mexican college students are leading a march of unions, students and other supporters through Mexico City to demand the young men be found on the second anniversary of their disappearance.

On Sept. 26, 2014, the students from the Rural Normal School at Ayotzinapa were in the southern city of Iguala hijacking buses. Local police intercepted them and turned them over to a local drug cartel.

The government's initial investigation decided the students were killed and incinerated in a fire. But international experts have cast doubt on this theory and the families have not accepted it.

Clemente Rodriguez's son Christian is among the missing and he believes that his son and the others are still alive and that the families will never believe the government.