Head of UN in Dubai - blames US Immigration for stoping him - reveals he holds two valid UN Laissez-Passers

CORRUPTION AT UNITED NATIONS

a UN official (Mr Keyscher) blamed US Immigration authorities for stopping him at Washington Airport while he claims that he was on "Official trip on behalf of UN" and showing US Immigration not 1(one) but 2(two) valid Un Laissez passers - one blue (for low officials) and one red (for high level officials).

How can anyone inside the United Nations have two valid UNLPs at same time.

How can any Immigration service int he world honor a UN issued document knowing that the same very person holds two similar documents valid at same time?