came here using business visa last october. yes i was hold at NAIA. 1st atempt the IO asked me where is the communication letter from my company that they are sending me for training. i showed her my company's Id, invitation letter, roundtrip ticket and some additional documents. the IO told me that that lettr is needed, she told me to let my company fax that letter. 2nd attempt: when the line is almost small, i went again to try to another IO, i presented to her all my documents,and the same, she's asking me the endorsement letter from my company. and she asked questions like -where did i graduate in college? my course? why is my course not related to my work now? do i know anybody in doha? and she gave me a paper and instructed me to go at the back and tell the IO on duty that my flight is on final call. the next IO interviewd me again and asked all sorts of questions about my company.as in naninidak talaga mga tanong nila.pati tingin nila e straight to the eye.i was hopeless na talaga, daming tanong na di ko na masagot. and he keeps on looking at all my papers.talgang final call na so talagang di na ako matuloy i said to myself, last minute nakita nya may previous flight ako.tas un sabi nya "go na to, ayusin ko lang paper nya, may previous flight pala" pero late na ang pag GO nya sa akin.iniwan na ako ng eroplano. i rebooked again the next day.ayun pag pasok sa iimigration, went to their office, got hold of my paper, pila again sa immigration..they asked me who interviewed me yesterday, pumasok sa office nila ung IO, sabi verify muna daw nila.after ilang minutes ayun ok na daw.buti di na maraming tanong at tinatakan na pasport ko.i was nervous at first talaga pero pinapalakas ko isip ko para relax ako sumagot sa mga tanong nila. relax, look at the IO' s eye straight when answering questions and PRAY PRAY PRAY.