Individually tag a bunch of AWS items - error handling per item (less efficient as not one operation)

tag_per_item.ps1

$a = Get-EC2NetworkInterface -Region ap-southeast-2
$tag = New-Object Amazon.EC2.Model.Tag
$tag.Key = "Environment"
$tag.Value = "Dev"
$count = 0
$throwError =""
foreach ($i in $a) {
    Clear-Variable -Name throwError #Reset Failure Variable
    $count++
    if ($count -gt 0) {
        Write-Host -ForegroundColor Cyan -NoNewline "$count of $($a.Count) : "
        write-host -NoNewline $i.NetworkInterfaceId
        try {
            New-EC2Tag -Tag $tag -Resource $i.NetworkInterfaceId
        } catch {
            #Catch throw test
            $throwError = $_
        } finally {
            if ([bool]$throwError) {
                Write-Host -ForegroundColor Red $throwError
                pause
            } else {
                Write-Host -ForegroundColor Green "...tagged"
            }
        }
    }

}