Aid showdown: Venezuela opposition prepares to deliver goods

Policemen stand guard during a concert at Tienditas International Bridge, in Venezuela, Friday, Feb. 22, 2019, on the border with Colomcia. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Policemen stand guard during a concert at Tienditas International Bridge, in Venezuela, Friday, Feb. 22, 2019, on the border with Colomcia. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Government supporters flash heart-hand signals during the "Hands off Venezuela" concert at the Tienditas International Bridge, in Venezuela on the border with Colombia, Friday, Feb. 22, 2019. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Government supporters flash heart-hand signals during the "Hands off Venezuela" concert at the Tienditas International Bridge, in Venezuela on the border with Colombia, Friday, Feb. 22, 2019. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Venezuela's self-proclaimed interim president Juan Guaido, arrives at the Venezuela Aid Live concert on the Colombian side of the Tienditas International Bridge near Cucuta, Colombia, on the border with Venezuela, Friday, Feb. 22, 2019. (AP Photo/Fernando Vergara)
Venezuela's self-proclaimed interim president Juan Guaido, arrives at the Venezuela Aid Live concert on the Colombian side of the Tienditas International Bridge near Cucuta, Colombia, on the border with Venezuela, Friday, Feb. 22, 2019. (AP Photo/Fernando Vergara)
Gusi, from left, Carlos Vives and Santiago Cruz, hold a Venezuelan national flag as they perform at the "Live Aid Venezuela" concert at the Tienditas International Bridge on the outskirts of Cucuta, Colombia, Friday, Feb. 22, 2019, on the border with Venezuela. British billionaire Richard Branson organized the mega concert, which features dozens of Latin musicians performing on a giant stage on one side of what Colombian authorities have renamed the "Unity" bridge. (AP Photo/Fernando Vergara)
Gusi, from left, Carlos Vives and Santiago Cruz, hold a Venezuelan national flag as they perform at the "Live Aid Venezuela" concert at the Tienditas International Bridge on the outskirts of Cucuta, Colombia, Friday, Feb. 22, 2019, on the border with Venezuela. British billionaire Richard Branson organized the mega concert, which features dozens of Latin musicians performing on a giant stage on one side of what Colombian authorities have renamed the "Unity" bridge. (AP Photo/Fernando Vergara)
Ricardo Montaner performs at the "Live Aid Venezuela" concert at the Tienditas International Bridge on the outskirts of Cucuta, Colombia, Friday, Feb. 22, 2019, on the border with Venezuela. British billionaire Richard Branson organized the mega concert, which features dozens of Latin musicians performing on a giant stage on one side of what Colombian authorities have renamed the "Unity" bridge. (AP Photo/Fernando Vergara)
Ricardo Montaner performs at the "Live Aid Venezuela" concert at the Tienditas International Bridge on the outskirts of Cucuta, Colombia, Friday, Feb. 22, 2019, on the border with Venezuela. British billionaire Richard Branson organized the mega concert, which features dozens of Latin musicians performing on a giant stage on one side of what Colombian authorities have renamed the "Unity" bridge. (AP Photo/Fernando Vergara)
Carlos Vives performs at the "Live Aid Venezuela" concert at the Tienditas International Bridge on the outskirts of Cucuta, Colombia, Friday, Feb. 22, 2019, on the border with Venezuela. British billionaire Richard Branson organized the mega concert, which features dozens of Latin musicians performing on a giant stage on one side of what Colombian authorities have renamed the "Unity" bridge. (AP Photo/Fernando Vergara)
Carlos Vives performs at the "Live Aid Venezuela" concert at the Tienditas International Bridge on the outskirts of Cucuta, Colombia, Friday, Feb. 22, 2019, on the border with Venezuela. British billionaire Richard Branson organized the mega concert, which features dozens of Latin musicians performing on a giant stage on one side of what Colombian authorities have renamed the "Unity" bridge. (AP Photo/Fernando Vergara)
Colombian Army snipers cover the Venezuela Aid Live concert on the Colombian side of the Tienditas International Bridge near Cucuta, Colombia, on the border with Venezuela, Friday, Feb. 22, 2019. (AP Photo/Fernando Vergara)
Colombian Army snipers cover the Venezuela Aid Live concert on the Colombian side of the Tienditas International Bridge near Cucuta, Colombia, on the border with Venezuela, Friday, Feb. 22, 2019. (AP Photo/Fernando Vergara)
Diosdado Cabello, President of Venezuela's Constituent Assembly, talks to supporters during the first day of the "Hands off Venezuela" three-day music festival at the Tienditas International Bridge, in Urena, Venezuela, Friday, Feb. 22, 2019, on the border with Colombia. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Diosdado Cabello, President of Venezuela's Constituent Assembly, talks to supporters during the first day of the "Hands off Venezuela" three-day music festival at the Tienditas International Bridge, in Urena, Venezuela, Friday, Feb. 22, 2019, on the border with Colombia. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Government supporters chant anti-U.S. slogans during the first day of the "Hands off Venezuela" three-day music festival at the Tienditas International Bridge, in Urena, Venezuela, Friday, Feb. 22, 2019, on the border with Colombia. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Government supporters chant anti-U.S. slogans during the first day of the "Hands off Venezuela" three-day music festival at the Tienditas International Bridge, in Urena, Venezuela, Friday, Feb. 22, 2019, on the border with Colombia. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Government supporters gather during the first day of the "Hands off Venezuela" three-day music festival at the Tienditas International Bridge, in Urena, Venezuela, Friday, Feb. 22, 2019, on the border with Colombia. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Government supporters gather during the first day of the "Hands off Venezuela" three-day music festival at the Tienditas International Bridge, in Urena, Venezuela, Friday, Feb. 22, 2019, on the border with Colombia. Venezuela's power struggle is set to convert into a battle of the bands Friday when musicians demanding Nicolas Maduro allow in humanitarian aid and those supporting the embattled leader's refusal sing in rival concerts being held at both sides of a border bridge where tons of donated food and medicine are being stored. (AP Photo/Rodrigo Abd)
Numerosas personas comienzan a llenar el lugar del concierto Venezuela Aid Live en la parte colombiana del puente internacional Las Tienditas, en la frontera con Venezuela, el viernes 22 de febrero de 2019. (AP Foto/Fernando Vergara)
Numerosas personas comienzan a llenar el lugar del concierto Venezuela Aid Live en la parte colombiana del puente internacional Las Tienditas, en la frontera con Venezuela, el viernes 22 de febrero de 2019. (AP Foto/Fernando Vergara)