<span style="color: #222222;">Pakistan summoned a senior US diplomat in Islamabad on Tuesday and lodged a protest over President Donald Trump's allegations on harbouring al-Qaeda chief Osama bin Laden. </span><br />'' <br />'' <span style="color: #222222;">Islamabad said it was a closed chapter of history and could seriously undermine bilateral ties.</span><br />''<br />'' <span style="color: #222222;">Trump on Sunday, in his tweets, defended his administration's decision to stop hundreds of millions of dollars in military aid to Pakistan for not doing enough to curb terrorism. He criticised Islamabad for offering a hideout to slain al-Qaeda chief bin Laden in the garrison city of Abbottabad.</span><br />'' <span style="color: #222222;"> </span><br />'' <span style="color: #222222;">Pakistan Foreign Secretary Tehmina Janjua called in the United States charge d'affaires Paul Jones to register a strong protest on what it called  unwarranted and unsubstantiated allegations made against Pakistan, Foreign Office spokesman said in a statement </span><br />''  <br />