The US on Monday revealed that it is "suspending its participation in bilateral channels with Russia" saying Russia has failed to keep up to it's part of the cease-fire agreement in Aleppo, Syria.
According to the US, all it's relations with Vladmir Putin's nation has been suspended, a decision they didn't take lightly.
In recent days, Russian and Syrian aircraft have carried out attacks in Aleppo, using bunker-busting bombs, incendiary munitions, cluster bombs, barrel bombs and thermobaric bombs, which scatter a cloud of explosive particles before detonating in devastating blasts, according to American intelligence officials.